This patch fixed two major problems when we do the color convesion with GLES2. 1. lack of necessary formats in FBO pool. GLES2 has three different possible texture formats, GL_RGBA, GL_BGRA and GL_ALPHA. Previous implementation only has one bucket for all the three formats which may reuse a incorrect texture format when do the cache lookup. After this fix, we can enable fbo safely when running with GLES2. 2. Refine the format matching method in glamor_get_tex_format_type_from_pictformat. If both revertion and swap_rb are needed, for example use GL_RGBA to represent PICT_b8g8r8a8. Then the downloading and uploading should be handled differently. The picture's format is PICT_b8g8r8a8, Then the expecting color layout is as below (little endian): 0 1 2 3 : address a r g b Now the in GLES2 the supported color format is GL_RGBA, type is GL_UNSIGNED_TYPE, then we need to shuffle the fragment color as : frag_color = sample(texture).argb; before we use glReadPixel to get it back. For the uploading process, the shuffle is a revert shuffle. We still use GL_RGBA, GL_UNSIGNED_BYTE to upload the color to a texture, then let's see 0 1 2 3 : address a r g b : correct colors R G B A : GL_RGBA with GL_UNSIGNED_BYTE Now we need to shuffle again, the mapping rule is r = G, g = B, b = A, a = R. Then the uploading shuffle is as below: frag_color = sample(texture).gbar; After this commit, gles2 version can pass render check with all the formats except those 1555/2101010. Signed-off-by: Zhigang Gong <zhigang.gong@linux.intel.com>
137 lines
4.0 KiB
C
137 lines
4.0 KiB
C
/*
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* Copyright © 2009 Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* Authors:
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* Eric Anholt <eric@anholt.net>
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*
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*/
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#include "glamor_priv.h"
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static Bool
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_glamor_set_spans(DrawablePtr drawable, GCPtr gc, char *src,
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DDXPointPtr points, int *widths, int n, int sorted,
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Bool fallback)
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{
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PixmapPtr dest_pixmap = glamor_get_drawable_pixmap(drawable);
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glamor_pixmap_private *dest_pixmap_priv;
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glamor_screen_private *glamor_priv =
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glamor_get_screen_private(drawable->pScreen);
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glamor_gl_dispatch *dispatch;
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GLenum format, type;
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int no_alpha, revert, i;
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uint8_t *drawpixels_src = (uint8_t *) src;
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RegionPtr clip = fbGetCompositeClip(gc);
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BoxRec *pbox;
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int x_off, y_off;
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Bool ret = FALSE;
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int swap_rb;
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dest_pixmap_priv = glamor_get_pixmap_private(dest_pixmap);
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if (!GLAMOR_PIXMAP_PRIV_HAS_FBO(dest_pixmap_priv)) {
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glamor_fallback("pixmap has no fbo.\n");
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goto fail;
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}
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if (glamor_priv->gl_flavor == GLAMOR_GL_ES2) {
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glamor_fallback("ES2 fallback.\n");
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goto fail;
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}
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if (glamor_get_tex_format_type_from_pixmap(dest_pixmap,
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&format,
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&type, &no_alpha,
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&revert,
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&swap_rb,
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1)) {
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glamor_fallback("unknown depth. %d \n", drawable->depth);
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goto fail;
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}
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glamor_set_destination_pixmap_priv_nc(dest_pixmap_priv);
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glamor_validate_pixmap(dest_pixmap);
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if (!glamor_set_planemask(dest_pixmap, gc->planemask))
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goto fail;
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glamor_get_drawable_deltas(drawable, dest_pixmap, &x_off, &y_off);
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dispatch = glamor_get_dispatch(glamor_priv);
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glamor_set_alu(dispatch, gc->alu);
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for (i = 0; i < n; i++) {
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n = REGION_NUM_RECTS(clip);
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pbox = REGION_RECTS(clip);
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while (n--) {
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if (pbox->y1 > points[i].y)
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break;
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dispatch->glScissor(pbox->x1,
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points[i].y + y_off,
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pbox->x2 - pbox->x1, 1);
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dispatch->glEnable(GL_SCISSOR_TEST);
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dispatch->glRasterPos2i(points[i].x + x_off,
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points[i].y + y_off);
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dispatch->glDrawPixels(widths[i], 1, format,
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type, drawpixels_src);
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}
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drawpixels_src +=
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PixmapBytePad(widths[i], drawable->depth);
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}
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glamor_set_planemask(dest_pixmap, ~0);
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glamor_set_alu(dispatch, GXcopy);
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dispatch->glDisable(GL_SCISSOR_TEST);
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glamor_put_dispatch(glamor_priv);
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ret = TRUE;
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goto done;
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fail:
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if (!fallback
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&& glamor_ddx_fallback_check_pixmap(drawable))
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goto done;
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glamor_fallback("to %p (%c)\n",
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drawable, glamor_get_drawable_location(drawable));
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if (glamor_prepare_access(drawable, GLAMOR_ACCESS_RW)) {
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fbSetSpans(drawable, gc, src, points, widths, n, sorted);
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glamor_finish_access(drawable, GLAMOR_ACCESS_RW);
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}
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ret = TRUE;
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done:
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return ret;
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}
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void
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glamor_set_spans(DrawablePtr drawable, GCPtr gc, char *src,
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DDXPointPtr points, int *widths, int n, int sorted)
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{
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_glamor_set_spans(drawable, gc, src, points,
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widths, n, sorted, TRUE);
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}
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Bool
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glamor_set_spans_nf(DrawablePtr drawable, GCPtr gc, char *src,
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DDXPointPtr points, int *widths, int n, int sorted)
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{
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return _glamor_set_spans(drawable, gc, src, points,
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widths, n, sorted, FALSE);
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}
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