bool
intel_copy_texsubimage(struct intel_context *intel,
struct intel_texture_image *intelImage,
GLint dstx, GLint dsty,
struct intel_renderbuffer *irb,
GLint x, GLint y, GLsizei width, GLsizei height)
{
struct gl_context *ctx = &intel->ctx;
struct intel_region *region;
const GLenum internalFormat = intelImage->base.Base.InternalFormat;
bool copy_supported = false;
bool copy_supported_with_alpha_override = false;
intel_prepare_render(intel);
if (!intelImage->mt || !irb || !irb->mt) {
if (unlikely(INTEL_DEBUG & DEBUG_PERF))
fprintf(stderr, "%s fail %p %p (0x%08x)\n",
__FUNCTION__, intelImage->mt, irb, internalFormat);
return false;
} else {
region = irb->mt->region;
assert(region);
}
/* According to the Ivy Bridge PRM, Vol1 Part4, section 1.2.1.2 (Graphics
* Data Size Limitations):
*
* The BLT engine is capable of transferring very large quantities of
* graphics data. Any graphics data read from and written to the
* destination is permitted to represent a number of pixels that
* occupies up to 65,536 scan lines and up to 32,768 bytes per scan line
* at the destination. The maximum number of pixels that may be
* represented per scan line’s worth of graphics data depends on the
* color depth.
*
* Furthermore, intelEmitCopyBlit (which is called below) uses a signed
* 16-bit integer to represent buffer pitch, so it can only handle buffer
* pitches < 32k.
*
* As a result of these two limitations, we can only use the blitter to do
* this copy when the region's pitch is less than 32k.
*/
if (region->pitch >= 32768)
return false;
if (intelImage->base.Base.TexObject->Target == GL_TEXTURE_1D_ARRAY ||
intelImage->base.Base.TexObject->Target == GL_TEXTURE_2D_ARRAY) {
perf_debug("no support for array textures\n");
}
copy_supported = intelImage->base.Base.TexFormat == intel_rb_format(irb);
/* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */
if (intel_rb_format(irb) == MESA_FORMAT_ARGB8888 &&
intelImage->base.Base.TexFormat == MESA_FORMAT_XRGB8888) {
copy_supported = true;
}
/* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */
if (intel_rb_format(irb) == MESA_FORMAT_XRGB8888 &&
intelImage->base.Base.TexFormat == MESA_FORMAT_ARGB8888) {
copy_supported_with_alpha_override = true;
}
if (!copy_supported && !copy_supported_with_alpha_override) {
if (unlikely(INTEL_DEBUG & DEBUG_PERF))
fprintf(stderr, "%s mismatched formats %s, %s\n",
__FUNCTION__,
_mesa_get_format_name(intelImage->base.Base.TexFormat),
_mesa_get_format_name(intel_rb_format(irb)));
return false;
}
{
GLuint image_x, image_y;
GLshort src_pitch;
/* get dest x/y in destination texture */
intel_miptree_get_image_offset(intelImage->mt,
intelImage->base.Base.Level,
intelImage->base.Base.Face,
&image_x, &image_y);
/* The blitter can't handle Y-tiled buffers. */
if (intelImage->mt->region->tiling == I915_TILING_Y) {
return false;
}
if (_mesa_is_winsys_fbo(ctx->ReadBuffer)) {
/* Flip vertical orientation for system framebuffers */
y = ctx->ReadBuffer->Height - (y + height);
src_pitch = -region->pitch;
} else {
/* reading from a FBO, y is already oriented the way we like */
src_pitch = region->pitch;
}
/* blit from src buffer to texture */
if (!intelEmitCopyBlit(intel,
intelImage->mt->cpp,
src_pitch,
region->bo,
0,
region->tiling,
intelImage->mt->region->pitch,
intelImage->mt->region->bo,
0,
intelImage->mt->region->tiling,
irb->draw_x + x, irb->draw_y + y,
image_x + dstx, image_y + dsty,
width, height,
GL_COPY)) {
return false;
}
}
if (copy_supported_with_alpha_override)
intel_set_teximage_alpha_to_one(ctx, intelImage);
return true;
}
bool
intel_copy_texsubimage(struct intel_context *intel,
struct intel_texture_image *intelImage,
GLint dstx, GLint dsty,
struct intel_renderbuffer *irb,
GLint x, GLint y, GLsizei width, GLsizei height)
{
struct gl_context *ctx = &intel->ctx;
struct intel_region *region;
const GLenum internalFormat = intelImage->base.Base.InternalFormat;
bool copy_supported = false;
bool copy_supported_with_alpha_override = false;
intel_prepare_render(intel);
if (!intelImage->mt || !irb || !irb->mt) {
if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))
fprintf(stderr, "%s fail %p %p (0x%08x)\n",
__FUNCTION__, intelImage->mt, irb, internalFormat);
return false;
} else {
region = irb->mt->region;
assert(region);
}
copy_supported = intelImage->base.Base.TexFormat == intel_rb_format(irb);
/* Converting ARGB8888 to XRGB8888 is trivial: ignore the alpha bits */
if (intel_rb_format(irb) == MESA_FORMAT_ARGB8888 &&
intelImage->base.Base.TexFormat == MESA_FORMAT_XRGB8888) {
copy_supported = true;
}
/* Converting XRGB8888 to ARGB8888 requires setting the alpha bits to 1.0 */
if (intel_rb_format(irb) == MESA_FORMAT_XRGB8888 &&
intelImage->base.Base.TexFormat == MESA_FORMAT_ARGB8888) {
copy_supported_with_alpha_override = true;
}
if (!copy_supported && !copy_supported_with_alpha_override) {
if (unlikely(INTEL_DEBUG & DEBUG_FALLBACKS))
fprintf(stderr, "%s mismatched formats %s, %s\n",
__FUNCTION__,
_mesa_get_format_name(intelImage->base.Base.TexFormat),
_mesa_get_format_name(intel_rb_format(irb)));
return false;
}
{
GLuint image_x, image_y;
GLshort src_pitch;
/* get dest x/y in destination texture */
intel_miptree_get_image_offset(intelImage->mt,
intelImage->base.Base.Level,
intelImage->base.Base.Face,
0,
&image_x, &image_y);
/* The blitter can't handle Y-tiled buffers. */
if (intelImage->mt->region->tiling == I915_TILING_Y) {
return false;
}
if (ctx->ReadBuffer->Name == 0) {
/* Flip vertical orientation for system framebuffers */
y = ctx->ReadBuffer->Height - (y + height);
src_pitch = -region->pitch;
} else {
/* reading from a FBO, y is already oriented the way we like */
src_pitch = region->pitch;
}
/* blit from src buffer to texture */
if (!intelEmitCopyBlit(intel,
intelImage->mt->cpp,
src_pitch,
region->bo,
0,
region->tiling,
intelImage->mt->region->pitch,
intelImage->mt->region->bo,
0,
intelImage->mt->region->tiling,
irb->draw_x + x, irb->draw_y + y,
image_x + dstx, image_y + dsty,
width, height,
GL_COPY)) {
return false;
}
}
if (copy_supported_with_alpha_override)
intel_set_teximage_alpha_to_one(ctx, intelImage);
return true;
}
