mesa: overhaul the glGetTexImage code
1. Reorganize the error checking code. 2. Lay groundwork for getting sub images by passing image offset and dimensions to the error checking code. 3. Implement _mesa_GetnTexImageARB(), _mesa_GetTexImage() and _mesa_GetTextureImage() all in terms of get_texture_image(). v2: pass offset/width/height/depth arguments to the error checking function, avoid using magic width/height/depth values. v3: remove unused bufSize param to get_texture_image() Reviewed-by: Ilia Mirkin <imirkin@alum.mit.edu>
This commit is contained in:
Brian Paul
+445
-212
@@ -891,28 +891,298 @@ legal_getteximage_target(struct gl_context *ctx, GLenum target, bool dsa)
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/**
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* Do error checking for a glGetTex(ture)Image() call.
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* \return GL_TRUE if any error, GL_FALSE if no errors.
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* Wrapper for _mesa_select_tex_image() which can handle target being
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* GL_TEXTURE_CUBE_MAP_ARB in which case we use zoffset to select a cube face.
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* This can happen for glGetTextureImage (DSA function).
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*/
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static GLboolean
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getteximage_error_check(struct gl_context *ctx,
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struct gl_texture_image *texImage,
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GLenum target, GLint level,
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GLenum format, GLenum type, GLsizei clientMemSize,
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GLvoid *pixels, bool dsa)
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static struct gl_texture_image *
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select_tex_image(const struct gl_texture_object *texObj, GLenum target,
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GLint level, GLint zoffset)
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{
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const GLint maxLevels = _mesa_max_texture_levels(ctx, target);
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const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
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GLenum baseFormat;
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const char *suffix = dsa ? "ture" : "";
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assert(texImage);
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assert(maxLevels != 0);
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if (level < 0 || level >= maxLevels) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"glGetTex%sImage(level out of range)", suffix);
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return GL_TRUE;
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assert(level >= 0);
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assert(level < MAX_TEXTURE_LEVELS);
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if (target == GL_TEXTURE_CUBE_MAP) {
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assert(zoffset >= 0);
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assert(zoffset < 6);
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target = GL_TEXTURE_CUBE_MAP_POSITIVE_X + zoffset;
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}
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return _mesa_select_tex_image(texObj, target, level);
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}
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/**
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* Error-check the offset and size arguments to
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* glGet[Compressed]TextureSubImage(). Also checks if the specified
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* texture image is missing.
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* \return true if error, false if no error.
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*/
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static bool
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dimensions_error_check(struct gl_context *ctx,
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struct gl_texture_object *texObj,
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GLenum target, GLint level,
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GLint xoffset, GLint yoffset, GLint zoffset,
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GLsizei width, GLsizei height, GLsizei depth,
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const char *caller)
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{
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const struct gl_texture_image *texImage;
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int i;
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if (xoffset < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(xoffset = %d)", caller, xoffset);
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return true;
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}
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if (yoffset < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(yoffset = %d)", caller, yoffset);
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return true;
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}
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if (zoffset < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(zoffset = %d)", caller, zoffset);
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return true;
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}
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if (width < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(width = %d)", caller, width);
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return true;
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}
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if (height < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(height = %d)", caller, height);
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return true;
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}
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if (depth < 0) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(depth = %d)", caller, depth);
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return true;
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}
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/* do special per-target checks */
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switch (target) {
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case GL_TEXTURE_1D:
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if (yoffset != 0) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(1D, yoffset = %d)", caller, yoffset);
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return true;
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}
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if (height != 1) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(1D, height = %d)", caller, height);
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return true;
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}
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/* fall-through */
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case GL_TEXTURE_1D_ARRAY:
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case GL_TEXTURE_2D:
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case GL_TEXTURE_RECTANGLE:
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if (zoffset != 0) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(zoffset = %d)", caller, zoffset);
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return true;
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}
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if (depth != 1) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(depth = %d)", caller, depth);
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return true;
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}
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break;
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case GL_TEXTURE_CUBE_MAP:
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/* Non-array cube maps are special because we have a gl_texture_image
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* per face.
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*/
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if (zoffset + depth > 6) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(zoffset + depth = %d)", caller, zoffset + depth);
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return true;
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}
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/* check that the range of faces exist */
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for (i = 0; i < depth; i++) {
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GLenum face = GL_TEXTURE_CUBE_MAP_POSITIVE_X + zoffset + i;
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if (!_mesa_select_tex_image(texObj, face, level)) {
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/* non-existant face */
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"%s(missing cube face)", caller);
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return true;
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}
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}
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break;
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default:
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; /* nothing */
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}
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texImage = select_tex_image(texObj, target, level, zoffset);
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if (!texImage) {
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/* missing texture image */
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"%s(zoffset = %d)", caller, zoffset);
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return true;
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}
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if (xoffset + width > texImage->Width) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(xoffset %d + width %d > %u)",
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caller, xoffset, width, texImage->Width);
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return true;
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}
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if (yoffset + height > texImage->Height) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(yoffset %d + height %d > %u)",
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caller, yoffset, height, texImage->Height);
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return true;
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}
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if (target != GL_TEXTURE_CUBE_MAP) {
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/* Cube map error checking was done above */
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if (zoffset + depth > texImage->Depth) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(zoffset %d + depth %d > %u)",
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caller, zoffset, depth, texImage->Depth);
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return true;
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}
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}
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/* Extra checks for compressed textures */
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{
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GLuint bw, bh;
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_mesa_get_format_block_size(texImage->TexFormat, &bw, &bh);
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if (bw > 1 || bh > 1) {
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/* offset must be multiple of block size */
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if (xoffset % bw != 0) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(xoffset = %d)", caller, xoffset);
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return true;
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}
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if (target != GL_TEXTURE_1D && target != GL_TEXTURE_1D_ARRAY) {
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if (yoffset % bh != 0) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(yoffset = %d)", caller, yoffset);
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return true;
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}
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}
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/* The size must be a multiple of bw x bh, or we must be using a
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* offset+size that exactly hits the edge of the image.
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*/
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if ((width % bw != 0) &&
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(xoffset + width != (GLint) texImage->Width)) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(width = %d)", caller, width);
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return true;
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}
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if ((height % bh != 0) &&
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(yoffset + height != (GLint) texImage->Height)) {
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_mesa_error(ctx, GL_INVALID_VALUE,
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"%s(height = %d)", caller, height);
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return true;
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}
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}
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}
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if (width == 0 || height == 0 || depth == 0) {
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/* Not an error, but nothing to do. Return 'true' so that the
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* caller simply returns.
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*/
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return true;
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}
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return false;
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}
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/**
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* Do PBO-related error checking for getting uncompressed images.
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* \return true if there was an error (or the GetTexImage is to be a no-op)
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*/
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static bool
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pbo_error_check(struct gl_context *ctx, GLenum target,
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GLsizei width, GLsizei height, GLsizei depth,
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GLenum format, GLenum type, GLsizei clientMemSize,
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GLvoid *pixels,
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const char *caller)
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{
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const GLuint dimensions = (target == GL_TEXTURE_3D) ? 3 : 2;
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if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, width, height, depth,
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format, type, clientMemSize, pixels)) {
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if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"%s(out of bounds PBO access)", caller);
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} else {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"%s(out of bounds access: bufSize (%d) is too small)",
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caller, clientMemSize);
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}
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return true;
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}
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if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
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/* PBO should not be mapped */
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if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"%s(PBO is mapped)", caller);
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return true;
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}
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}
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if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
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/* not an error, do nothing */
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return true;
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}
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return false;
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}
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/**
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* Do error checking for all (non-compressed) get-texture-image functions.
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* \return true if any error, false if no errors.
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*/
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static bool
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getteximage_error_check(struct gl_context *ctx,
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struct gl_texture_object *texObj,
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GLenum target, GLint level,
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GLint xoffset, GLint yoffset, GLint zoffset,
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GLsizei width, GLsizei height, GLsizei depth,
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GLenum format, GLenum type, GLsizei bufSize,
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GLvoid *pixels, const char *caller)
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{
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struct gl_texture_image *texImage;
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GLenum baseFormat, err;
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GLint maxLevels;
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assert(texObj);
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if (texObj->Target == 0) {
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_mesa_error(ctx, GL_INVALID_OPERATION, "%s(invalid texture)", caller);
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return true;
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}
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maxLevels = _mesa_max_texture_levels(ctx, target);
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if (level < 0 || level >= maxLevels) {
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_mesa_error(ctx, GL_INVALID_VALUE, "%s(level = %d)", caller, level);
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return true;
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}
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if (dimensions_error_check(ctx, texObj, target, level,
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xoffset, yoffset, zoffset,
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width, height, depth, caller)) {
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return true;
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}
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err = _mesa_error_check_format_and_type(ctx, format, type);
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if (err != GL_NO_ERROR) {
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_mesa_error(ctx, err, "%s(format/type)", caller);
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return true;
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}
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if (pbo_error_check(ctx, target, width, height, depth,
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format, type, bufSize, pixels, caller)) {
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return true;
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}
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texImage = select_tex_image(texObj, target, level, zoffset);
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assert(texImage);
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/*
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* Format and type checking has been moved up to GetnTexImage and
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@@ -927,282 +1197,245 @@ getteximage_error_check(struct gl_context *ctx,
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if (_mesa_is_color_format(format)
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&& !_mesa_is_color_format(baseFormat)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(format mismatch)", suffix);
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return GL_TRUE;
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"%s(format mismatch)", caller);
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return true;
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}
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else if (_mesa_is_depth_format(format)
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&& !_mesa_is_depth_format(baseFormat)
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&& !_mesa_is_depthstencil_format(baseFormat)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(format mismatch)", suffix);
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return GL_TRUE;
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"%s(format mismatch)", caller);
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return true;
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}
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else if (_mesa_is_stencil_format(format)
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&& !ctx->Extensions.ARB_texture_stencil8) {
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_mesa_error(ctx, GL_INVALID_ENUM,
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"glGetTex%sImage(format=GL_STENCIL_INDEX)", suffix);
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return GL_TRUE;
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"%s(format=GL_STENCIL_INDEX)", caller);
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return true;
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}
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else if (_mesa_is_ycbcr_format(format)
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&& !_mesa_is_ycbcr_format(baseFormat)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(format mismatch)", suffix);
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return GL_TRUE;
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"%s(format mismatch)", caller);
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return true;
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}
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else if (_mesa_is_depthstencil_format(format)
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&& !_mesa_is_depthstencil_format(baseFormat)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(format mismatch)", suffix);
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return GL_TRUE;
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"%s(format mismatch)", caller);
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return true;
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}
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else if (!_mesa_is_stencil_format(format) &&
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_mesa_is_enum_format_integer(format) !=
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_mesa_is_format_integer(texImage->TexFormat)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(format mismatch)", suffix);
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return GL_TRUE;
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"%s(format mismatch)", caller);
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return true;
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}
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if (!_mesa_validate_pbo_access(dimensions, &ctx->Pack, texImage->Width,
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texImage->Height, texImage->Depth,
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format, type, clientMemSize, pixels)) {
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if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(out of bounds PBO access)", suffix);
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} else {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"%s(out of bounds access:"
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" bufSize (%d) is too small)",
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dsa ? "glGetTextureImage" : "glGetnTexImageARB",
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clientMemSize);
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}
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return GL_TRUE;
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}
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if (_mesa_is_bufferobj(ctx->Pack.BufferObj)) {
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/* PBO should not be mapped */
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if (_mesa_check_disallowed_mapping(ctx->Pack.BufferObj)) {
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_mesa_error(ctx, GL_INVALID_OPERATION,
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"glGetTex%sImage(PBO is mapped)", suffix);
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return GL_TRUE;
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}
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}
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return GL_FALSE;
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return false;
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}
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/**
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* This is the implementation for glGetnTexImageARB, glGetTextureImage,
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* and glGetTexImage.
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*
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* Requires caller to pass in texImage object because _mesa_GetTextureImage
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* must handle the GL_TEXTURE_CUBE_MAP target.
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*
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* \param target texture target.
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* Return the width, height and depth of a texture image.
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* This function must be resilient to bad parameter values since
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* this is called before full error checking.
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*/
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static void
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get_texture_image_dims(const struct gl_texture_object *texObj,
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GLenum target, GLint level,
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GLsizei *width, GLsizei *height, GLsizei *depth)
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{
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const struct gl_texture_image *texImage = NULL;
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if (level >= 0 && level < MAX_TEXTURE_LEVELS) {
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texImage = _mesa_select_tex_image(texObj, target, level);
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}
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if (texImage) {
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*width = texImage->Width;
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*height = texImage->Height;
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if (target == GL_TEXTURE_CUBE_MAP) {
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*depth = 6;
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}
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else {
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*depth = texImage->Depth;
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}
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}
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else {
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*width = *height = *depth = 0;
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}
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}
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/**
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* Common code for all (uncompressed) get-texture-image functions.
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* \param texObj the texture object (should not be null)
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* \param target user-provided target, or 0 for DSA
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* \param level image level.
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* \param format pixel data format for returned image.
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* \param type pixel data type for returned image.
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* \param bufSize size of the pixels data buffer.
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* \param pixels returned pixel data.
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* \param dsa True when the caller is an ARB_direct_state_access function,
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* false otherwise
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* \param caller name of calling function
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*/
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static void
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get_texture_image(struct gl_context *ctx,
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struct gl_texture_object *texObj,
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struct gl_texture_image *texImage, GLenum target,
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GLint level, GLenum format, GLenum type,
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GLsizei bufSize, GLvoid *pixels, bool dsa)
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GLenum target, GLint level,
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GLint xoffset, GLint yoffset, GLint zoffset,
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GLsizei width, GLsizei height, GLint depth,
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GLenum format, GLenum type,
|
||||
GLvoid *pixels, const char *caller)
|
||||
{
|
||||
assert(texObj);
|
||||
assert(texImage);
|
||||
struct gl_texture_image *texImage;
|
||||
unsigned firstFace, numFaces, i;
|
||||
GLint imageStride;
|
||||
|
||||
FLUSH_VERTICES(ctx, 0);
|
||||
|
||||
/*
|
||||
* Legal target checking has been moved up to GetnTexImage and
|
||||
* GetTextureImage so that it can be caught before receiving a NULL
|
||||
* texImage object and exiting.
|
||||
*/
|
||||
texImage = select_tex_image(texObj, target, level, zoffset);
|
||||
assert(texImage); /* should have been error checked already */
|
||||
|
||||
if (getteximage_error_check(ctx, texImage, target, level, format,
|
||||
type, bufSize, pixels, dsa)) {
|
||||
if (_mesa_is_zero_size_texture(texImage)) {
|
||||
/* no image data to return */
|
||||
return;
|
||||
}
|
||||
|
||||
if (!_mesa_is_bufferobj(ctx->Pack.BufferObj) && !pixels) {
|
||||
/* not an error, do nothing */
|
||||
return;
|
||||
}
|
||||
|
||||
if (_mesa_is_zero_size_texture(texImage))
|
||||
return;
|
||||
|
||||
if (MESA_VERBOSE & (VERBOSE_API | VERBOSE_TEXTURE)) {
|
||||
_mesa_debug(ctx, "glGetTex%sImage(tex %u) format = %s, w=%d, h=%d,"
|
||||
_mesa_debug(ctx, "%s(tex %u) format = %s, w=%d, h=%d,"
|
||||
" dstFmt=0x%x, dstType=0x%x\n",
|
||||
dsa ? "ture": "",
|
||||
texObj->Name,
|
||||
caller, texObj->Name,
|
||||
_mesa_get_format_name(texImage->TexFormat),
|
||||
texImage->Width, texImage->Height,
|
||||
format, type);
|
||||
}
|
||||
|
||||
_mesa_lock_texture(ctx, texObj);
|
||||
{
|
||||
ctx->Driver.GetTexSubImage(ctx, 0, 0, 0,
|
||||
texImage->Width, texImage->Height,
|
||||
texImage->Depth,
|
||||
format, type, pixels, texImage);
|
||||
if (target == GL_TEXTURE_CUBE_MAP) {
|
||||
/* Compute stride between cube faces */
|
||||
imageStride = _mesa_image_image_stride(&ctx->Pack, width, height,
|
||||
format, type);
|
||||
firstFace = zoffset;
|
||||
numFaces = depth;
|
||||
zoffset = 0;
|
||||
depth = 1;
|
||||
}
|
||||
else {
|
||||
imageStride = 0;
|
||||
firstFace = _mesa_tex_target_to_face(target);
|
||||
numFaces = 1;
|
||||
}
|
||||
|
||||
_mesa_lock_texture(ctx, texObj);
|
||||
|
||||
for (i = 0; i < numFaces; i++) {
|
||||
texImage = texObj->Image[firstFace + i][level];
|
||||
assert(texImage);
|
||||
|
||||
ctx->Driver.GetTexSubImage(ctx, xoffset, yoffset, zoffset,
|
||||
width, height, depth,
|
||||
format, type, pixels, texImage);
|
||||
|
||||
/* next cube face */
|
||||
pixels = (GLubyte *) pixels + imageStride;
|
||||
}
|
||||
|
||||
_mesa_unlock_texture(ctx, texObj);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get texture image. Called by glGetTexImage.
|
||||
*
|
||||
* \param target texture target.
|
||||
* \param level image level.
|
||||
* \param format pixel data format for returned image.
|
||||
* \param type pixel data type for returned image.
|
||||
* \param bufSize size of the pixels data buffer.
|
||||
* \param pixels returned pixel data.
|
||||
*/
|
||||
|
||||
void GLAPIENTRY
|
||||
_mesa_GetnTexImageARB(GLenum target, GLint level, GLenum format,
|
||||
GLenum type, GLsizei bufSize, GLvoid *pixels)
|
||||
_mesa_GetnTexImageARB(GLenum target, GLint level, GLenum format, GLenum type,
|
||||
GLsizei bufSize, GLvoid *pixels)
|
||||
{
|
||||
struct gl_texture_object *texObj;
|
||||
struct gl_texture_image *texImage;
|
||||
GLenum err;
|
||||
GET_CURRENT_CONTEXT(ctx);
|
||||
static const char *caller = "glGetnTexImageARB";
|
||||
GLsizei width, height, depth;
|
||||
struct gl_texture_object *texObj;
|
||||
|
||||
/*
|
||||
* This has been moved here because a format/type mismatch can cause a NULL
|
||||
* texImage object, which in turn causes the mismatch error to be
|
||||
* ignored.
|
||||
*/
|
||||
err = _mesa_error_check_format_and_type(ctx, format, type);
|
||||
if (err != GL_NO_ERROR) {
|
||||
_mesa_error(ctx, err, "glGetnTexImage(format/type)");
|
||||
return;
|
||||
}
|
||||
|
||||
/*
|
||||
* Legal target checking has been moved here to prevent exiting with a NULL
|
||||
* texImage object.
|
||||
*/
|
||||
if (!legal_getteximage_target(ctx, target, false)) {
|
||||
_mesa_error(ctx, GL_INVALID_ENUM, "glGetnTexImage(target=0x%x)",
|
||||
target);
|
||||
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
|
||||
return;
|
||||
}
|
||||
|
||||
texObj = _mesa_get_current_tex_object(ctx, target);
|
||||
if (!texObj)
|
||||
return;
|
||||
assert(texObj);
|
||||
|
||||
texImage = _mesa_select_tex_image(texObj, target, level);
|
||||
if (!texImage)
|
||||
return;
|
||||
get_texture_image_dims(texObj, target, level, &width, &height, &depth);
|
||||
|
||||
get_texture_image(ctx, texObj, texImage, target, level, format, type,
|
||||
bufSize, pixels, false);
|
||||
if (getteximage_error_check(ctx, texObj, target, level,
|
||||
0, 0, 0, width, height, depth,
|
||||
format, type, bufSize, pixels, caller)) {
|
||||
return;
|
||||
}
|
||||
|
||||
get_texture_image(ctx, texObj, target, level,
|
||||
0, 0, 0, width, height, depth,
|
||||
format, type, pixels, caller);
|
||||
}
|
||||
|
||||
|
||||
void GLAPIENTRY
|
||||
_mesa_GetTexImage( GLenum target, GLint level, GLenum format,
|
||||
GLenum type, GLvoid *pixels )
|
||||
_mesa_GetTexImage(GLenum target, GLint level, GLenum format, GLenum type,
|
||||
GLvoid *pixels )
|
||||
{
|
||||
_mesa_GetnTexImageARB(target, level, format, type, INT_MAX, pixels);
|
||||
}
|
||||
|
||||
/**
|
||||
* Get texture image.
|
||||
*
|
||||
* \param texture texture name.
|
||||
* \param level image level.
|
||||
* \param format pixel data format for returned image.
|
||||
* \param type pixel data type for returned image.
|
||||
* \param bufSize size of the pixels data buffer.
|
||||
* \param pixels returned pixel data.
|
||||
*/
|
||||
void GLAPIENTRY
|
||||
_mesa_GetTextureImage(GLuint texture, GLint level, GLenum format,
|
||||
GLenum type, GLsizei bufSize, GLvoid *pixels)
|
||||
{
|
||||
struct gl_texture_object *texObj;
|
||||
struct gl_texture_image *texImage;
|
||||
int i;
|
||||
GLint image_stride;
|
||||
GLenum err;
|
||||
GET_CURRENT_CONTEXT(ctx);
|
||||
static const char *caller = "glGetTextImage";
|
||||
GLsizei width, height, depth;
|
||||
struct gl_texture_object *texObj;
|
||||
|
||||
/*
|
||||
* This has been moved here because a format/type mismatch can cause a NULL
|
||||
* texImage object, which in turn causes the mismatch error to be
|
||||
* ignored.
|
||||
*/
|
||||
err = _mesa_error_check_format_and_type(ctx, format, type);
|
||||
if (err != GL_NO_ERROR) {
|
||||
_mesa_error(ctx, err, "glGetTextureImage(format/type)");
|
||||
if (!legal_getteximage_target(ctx, target, false)) {
|
||||
_mesa_error(ctx, GL_INVALID_ENUM, "%s", caller);
|
||||
return;
|
||||
}
|
||||
|
||||
texObj = _mesa_lookup_texture_err(ctx, texture, "glGetTextureImage");
|
||||
if (!texObj)
|
||||
return;
|
||||
texObj = _mesa_get_current_tex_object(ctx, target);
|
||||
assert(texObj);
|
||||
|
||||
/*
|
||||
* Legal target checking has been moved here to prevent exiting with a NULL
|
||||
* texImage object.
|
||||
*/
|
||||
if (!legal_getteximage_target(ctx, texObj->Target, true)) {
|
||||
_mesa_error(ctx, GL_INVALID_ENUM, "glGetTextureImage(target=%s)",
|
||||
_mesa_enum_to_string(texObj->Target));
|
||||
get_texture_image_dims(texObj, target, level, &width, &height, &depth);
|
||||
|
||||
if (getteximage_error_check(ctx, texObj, target, level,
|
||||
0, 0, 0, width, height, depth,
|
||||
format, type, INT_MAX, pixels, caller)) {
|
||||
return;
|
||||
}
|
||||
|
||||
/* Must handle special case GL_TEXTURE_CUBE_MAP. */
|
||||
if (texObj->Target == GL_TEXTURE_CUBE_MAP) {
|
||||
|
||||
/* Make sure the texture object is a proper cube.
|
||||
* (See texturesubimage in teximage.c for details on why this check is
|
||||
* performed.)
|
||||
*/
|
||||
if (!_mesa_cube_level_complete(texObj, level)) {
|
||||
_mesa_error(ctx, GL_INVALID_OPERATION,
|
||||
"glGetTextureImage(cube map incomplete)");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Copy each face. */
|
||||
for (i = 0; i < 6; ++i) {
|
||||
texImage = texObj->Image[i][level];
|
||||
assert(texImage);
|
||||
|
||||
get_texture_image(ctx, texObj, texImage, texObj->Target, level,
|
||||
format, type, bufSize, pixels, true);
|
||||
|
||||
image_stride = _mesa_image_image_stride(&ctx->Pack, texImage->Width,
|
||||
texImage->Height, format,
|
||||
type);
|
||||
pixels = (GLubyte *) pixels + image_stride;
|
||||
bufSize -= image_stride;
|
||||
}
|
||||
}
|
||||
else {
|
||||
texImage = _mesa_select_tex_image(texObj, texObj->Target, level);
|
||||
if (!texImage)
|
||||
return;
|
||||
|
||||
get_texture_image(ctx, texObj, texImage, texObj->Target, level,
|
||||
format, type, bufSize, pixels, true);
|
||||
}
|
||||
get_texture_image(ctx, texObj, target, level,
|
||||
0, 0, 0, width, height, depth,
|
||||
format, type, pixels, caller);
|
||||
}
|
||||
|
||||
|
||||
void GLAPIENTRY
|
||||
_mesa_GetTextureImage(GLuint texture, GLint level, GLenum format, GLenum type,
|
||||
GLsizei bufSize, GLvoid *pixels)
|
||||
{
|
||||
GET_CURRENT_CONTEXT(ctx);
|
||||
GLsizei width, height, depth;
|
||||
static const char *caller = "glGetTextureImage";
|
||||
struct gl_texture_object *texObj =
|
||||
_mesa_lookup_texture_err(ctx, texture, caller);
|
||||
|
||||
if (!texObj) {
|
||||
return;
|
||||
}
|
||||
|
||||
get_texture_image_dims(texObj, texObj->Target, level,
|
||||
&width, &height, &depth);
|
||||
|
||||
if (getteximage_error_check(ctx, texObj, texObj->Target, level,
|
||||
0, 0, 0, width, height, depth,
|
||||
format, type, bufSize, pixels, caller)) {
|
||||
return;
|
||||
}
|
||||
|
||||
get_texture_image(ctx, texObj, texObj->Target, level,
|
||||
0, 0, 0, width, height, depth,
|
||||
format, type, pixels, caller);
|
||||
}
|
||||
|
||||
|
||||
/**
|
||||
* Do error checking for a glGetCompressedTexImage() call.
|
||||
* \return GL_TRUE if any error, GL_FALSE if no errors.
|
||||
|
||||
Reference in New Issue
Block a user