Mesa (master): meta: Move glBlitFramebuffer() to a separate file.
Eric Anholt
anholt at kemper.freedesktop.org
Thu Feb 13 00:20:43 UTC 2014
Module: Mesa
Branch: master
Commit: 3e4ccf499e1d0dd8bf6864f3aba96d58f0a96048
URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=3e4ccf499e1d0dd8bf6864f3aba96d58f0a96048
Author: Eric Anholt <eric at anholt.net>
Date: Mon Feb 3 15:31:01 2014 -0800
meta: Move glBlitFramebuffer() to a separate file.
v2: Drop a bunch of unnecessary includes (by Kenneth), rebase on idr's
changes.
Reviewed-by: Kenneth Graunke <kenneth at whitecape.org> (v1)
---
src/mesa/Makefile.sources | 1 +
src/mesa/drivers/common/meta.c | 420 -------------------------------
src/mesa/drivers/common/meta_blit.c | 466 +++++++++++++++++++++++++++++++++++
3 files changed, 467 insertions(+), 420 deletions(-)
diff --git a/src/mesa/Makefile.sources b/src/mesa/Makefile.sources
index bd02d3e..1ce94de 100644
--- a/src/mesa/Makefile.sources
+++ b/src/mesa/Makefile.sources
@@ -319,6 +319,7 @@ SPARC_FILES = \
COMMON_DRIVER_FILES = \
$(SRCDIR)drivers/common/driverfuncs.c \
+ $(SRCDIR)drivers/common/meta_blit.c \
$(SRCDIR)drivers/common/meta.c
diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index eef0b04..d3ca3b7 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -1346,39 +1346,6 @@ _mesa_meta_setup_drawpix_texture(struct gl_context *ctx,
}
}
-
-
-/**
- * One-time init for drawing depth pixels.
- */
-static void
-init_blit_depth_pixels(struct gl_context *ctx)
-{
- static const char *program =
- "!!ARBfp1.0\n"
- "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
- "END \n";
- char program2[200];
- struct blit_state *blit = &ctx->Meta->Blit;
- struct temp_texture *tex = _mesa_meta_get_temp_texture(ctx);
- const char *texTarget;
-
- assert(blit->DepthFP == 0);
-
- /* replace %s with "RECT" or "2D" */
- assert(strlen(program) + 4 < sizeof(program2));
- if (tex->Target == GL_TEXTURE_RECTANGLE)
- texTarget = "RECT";
- else
- texTarget = "2D";
- _mesa_snprintf(program2, sizeof(program2), program, texTarget);
-
- _mesa_GenProgramsARB(1, &blit->DepthFP);
- _mesa_BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
- _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
- strlen(program2), (const GLubyte *) program2);
-}
-
void
_mesa_meta_setup_ff_tnl_for_blit(GLuint *VAO, GLuint *VBO,
unsigned texcoord_size)
@@ -1390,393 +1357,6 @@ _mesa_meta_setup_ff_tnl_for_blit(GLuint *VAO, GLuint *VBO,
_mesa_LoadIdentity();
}
-static void
-setup_glsl_blit_framebuffer(struct gl_context *ctx,
- struct blit_state *blit,
- GLenum target)
-{
- /* target = GL_TEXTURE_RECTANGLE is not supported in GLES 3.0 */
- assert(_mesa_is_desktop_gl(ctx) || target == GL_TEXTURE_2D);
-
- _mesa_meta_setup_vertex_objects(&blit->VAO, &blit->VBO, true, 2, 2, 0);
-
- _mesa_meta_setup_blit_shader(ctx, target, &blit->shaders);
-}
-
-/**
- * Try to do a glBlitFramebuffer using no-copy texturing.
- * We can do this when the src renderbuffer is actually a texture.
- *
- * \return new buffer mask indicating the buffers left to blit using the
- * normal path.
- */
-static GLbitfield
-blitframebuffer_texture(struct gl_context *ctx,
- GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
- GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
- GLbitfield mask, GLenum filter, GLint flipX,
- GLint flipY, GLboolean glsl_version)
-{
- if (mask & GL_COLOR_BUFFER_BIT) {
- const struct gl_framebuffer *readFb = ctx->ReadBuffer;
- const struct gl_renderbuffer_attachment *readAtt =
- &readFb->Attachment[readFb->_ColorReadBufferIndex];
-
- if (readAtt && readAtt->Texture) {
- struct blit_state *blit = &ctx->Meta->Blit;
- const GLint dstX = MIN2(dstX0, dstX1);
- const GLint dstY = MIN2(dstY0, dstY1);
- const GLint dstW = abs(dstX1 - dstX0);
- const GLint dstH = abs(dstY1 - dstY0);
- const struct gl_texture_object *texObj = readAtt->Texture;
- const GLuint srcLevel = readAtt->TextureLevel;
- const GLint baseLevelSave = texObj->BaseLevel;
- const GLint maxLevelSave = texObj->MaxLevel;
- const GLenum target = texObj->Target;
- GLuint sampler, samplerSave =
- ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
- ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
-
- if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {
- /* Can't handle other texture types at this time */
- return mask;
- }
-
- /* Choose between glsl version and fixed function version of
- * BlitFramebuffer function.
- */
- if (glsl_version) {
- setup_glsl_blit_framebuffer(ctx, blit, target);
- }
- else {
- _mesa_meta_setup_ff_tnl_for_blit(&ctx->Meta->Blit.VAO,
- &ctx->Meta->Blit.VBO,
- 2);
- }
-
- _mesa_GenSamplers(1, &sampler);
- _mesa_BindSampler(ctx->Texture.CurrentUnit, sampler);
-
- /*
- printf("Blit from texture!\n");
- printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
- printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
- */
-
- /* Prepare src texture state */
- _mesa_BindTexture(target, texObj->Name);
- _mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, filter);
- _mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, filter);
- if (target != GL_TEXTURE_RECTANGLE_ARB) {
- _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
- _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
- }
- _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
- _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
-
- /* Always do our blits with no sRGB decode or encode. Note that
- * GL_FRAMEBUFFER_SRGB has already been disabled by
- * _mesa_meta_begin().
- */
- if (ctx->Extensions.EXT_texture_sRGB_decode) {
- _mesa_SamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
- GL_SKIP_DECODE_EXT);
- }
-
- if (ctx->API == API_OPENGL_COMPAT || ctx->API == API_OPENGLES) {
- _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
- _mesa_set_enable(ctx, target, GL_TRUE);
- }
-
- /* Prepare vertex data (the VBO was previously created and bound) */
- {
- struct vertex verts[4];
- GLfloat s0, t0, s1, t1;
-
- if (target == GL_TEXTURE_2D) {
- const struct gl_texture_image *texImage
- = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
- s0 = srcX0 / (float) texImage->Width;
- s1 = srcX1 / (float) texImage->Width;
- t0 = srcY0 / (float) texImage->Height;
- t1 = srcY1 / (float) texImage->Height;
- }
- else {
- assert(target == GL_TEXTURE_RECTANGLE_ARB);
- s0 = (float) srcX0;
- s1 = (float) srcX1;
- t0 = (float) srcY0;
- t1 = (float) srcY1;
- }
-
- /* Silence valgrind warnings about reading uninitialized stack. */
- memset(verts, 0, sizeof(verts));
-
- /* setup vertex positions */
- verts[0].x = -1.0F * flipX;
- verts[0].y = -1.0F * flipY;
- verts[1].x = 1.0F * flipX;
- verts[1].y = -1.0F * flipY;
- verts[2].x = 1.0F * flipX;
- verts[2].y = 1.0F * flipY;
- verts[3].x = -1.0F * flipX;
- verts[3].y = 1.0F * flipY;
-
- verts[0].tex[0] = s0;
- verts[0].tex[1] = t0;
- verts[1].tex[0] = s1;
- verts[1].tex[1] = t0;
- verts[2].tex[0] = s1;
- verts[2].tex[1] = t1;
- verts[3].tex[0] = s0;
- verts[3].tex[1] = t1;
-
- _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
- }
-
- /* setup viewport */
- _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
- _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
- _mesa_DepthMask(GL_FALSE);
- _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
-
- /* Restore texture object state, the texture binding will
- * be restored by _mesa_meta_end().
- */
- if (target != GL_TEXTURE_RECTANGLE_ARB) {
- _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
- _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
- }
-
- _mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
- _mesa_DeleteSamplers(1, &sampler);
-
- /* Done with color buffer */
- mask &= ~GL_COLOR_BUFFER_BIT;
- }
- }
-
- return mask;
-}
-
-
-/**
- * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
- * of texture mapping and polygon rendering.
- */
-void
-_mesa_meta_BlitFramebuffer(struct gl_context *ctx,
- GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
- GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
- GLbitfield mask, GLenum filter)
-{
- struct blit_state *blit = &ctx->Meta->Blit;
- struct temp_texture *tex = _mesa_meta_get_temp_texture(ctx);
- struct temp_texture *depthTex = _mesa_meta_get_temp_depth_texture(ctx);
- const GLsizei maxTexSize = tex->MaxSize;
- const GLint srcX = MIN2(srcX0, srcX1);
- const GLint srcY = MIN2(srcY0, srcY1);
- const GLint srcW = abs(srcX1 - srcX0);
- const GLint srcH = abs(srcY1 - srcY0);
- const GLint dstX = MIN2(dstX0, dstX1);
- const GLint dstY = MIN2(dstY0, dstY1);
- const GLint dstW = abs(dstX1 - dstX0);
- const GLint dstH = abs(dstY1 - dstY0);
- const GLint srcFlipX = (srcX1 - srcX0) / srcW;
- const GLint srcFlipY = (srcY1 - srcY0) / srcH;
- const GLint dstFlipX = (dstX1 - dstX0) / dstW;
- const GLint dstFlipY = (dstY1 - dstY0) / dstH;
- const GLint flipX = srcFlipX * dstFlipX;
- const GLint flipY = srcFlipY * dstFlipY;
-
- struct vertex verts[4];
- GLboolean newTex;
- const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
- ctx->Extensions.ARB_fragment_shader &&
- (ctx->API != API_OPENGLES);
-
- /* In addition to falling back if the blit size is larger than the maximum
- * texture size, fallback if the source is multisampled. This fallback can
- * be removed once Mesa gets support ARB_texture_multisample.
- */
- if (srcW > maxTexSize || srcH > maxTexSize
- || ctx->ReadBuffer->Visual.samples > 0) {
- /* XXX avoid this fallback */
- _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
- dstX0, dstY0, dstX1, dstY1, mask, filter);
- return;
- }
-
- /* only scissor effects blit so save/clear all other relevant state */
- _mesa_meta_begin(ctx, ~MESA_META_SCISSOR);
-
- /* Try faster, direct texture approach first */
- mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,
- dstX0, dstY0, dstX1, dstY1, mask, filter,
- dstFlipX, dstFlipY, use_glsl_version);
- if (mask == 0x0) {
- _mesa_meta_end(ctx);
- return;
- }
-
- /* Choose between glsl version and fixed function version of
- * BlitFramebuffer function.
- */
- if (use_glsl_version) {
- setup_glsl_blit_framebuffer(ctx, blit, tex->Target);
- }
- else {
- _mesa_meta_setup_ff_tnl_for_blit(&blit->VAO, &blit->VBO, 2);
- }
-
- /* Silence valgrind warnings about reading uninitialized stack. */
- memset(verts, 0, sizeof(verts));
-
- /* Continue with "normal" approach which involves copying the src rect
- * into a temporary texture and is "blitted" by drawing a textured quad.
- */
- {
- /* setup vertex positions */
- verts[0].x = -1.0F * flipX;
- verts[0].y = -1.0F * flipY;
- verts[1].x = 1.0F * flipX;
- verts[1].y = -1.0F * flipY;
- verts[2].x = 1.0F * flipX;
- verts[2].y = 1.0F * flipY;
- verts[3].x = -1.0F * flipX;
- verts[3].y = 1.0F * flipY;
-
- }
-
- /* glEnable() in gles2 and gles3 doesn't allow GL_TEXTURE_{1D, 2D, etc.}
- * tokens.
- */
- if (_mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES)
- _mesa_set_enable(ctx, tex->Target, GL_TRUE);
-
- if (mask & GL_COLOR_BUFFER_BIT) {
- const struct gl_framebuffer *readFb = ctx->ReadBuffer;
- const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer;
- const GLenum rb_base_format =
- _mesa_base_tex_format(ctx, colorReadRb->InternalFormat);
-
- /* Using the exact source rectangle to create the texture does incorrect
- * linear filtering along the edges. So, allocate the texture extended along
- * edges by one pixel in x, y directions.
- */
- _mesa_meta_setup_copypix_texture(ctx, tex,
- srcX - 1, srcY - 1, srcW + 2, srcH + 2,
- rb_base_format, filter);
- /* texcoords (after texture allocation!) */
- {
- verts[0].tex[0] = 1.0F;
- verts[0].tex[1] = 1.0F;
- verts[1].tex[0] = tex->Sright - 1.0F;
- verts[1].tex[1] = 1.0F;
- verts[2].tex[0] = tex->Sright - 1.0F;
- verts[2].tex[1] = tex->Ttop - 1.0F;
- verts[3].tex[0] = 1.0F;
- verts[3].tex[1] = tex->Ttop - 1.0F;
-
- /* upload new vertex data */
- _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
- }
-
- _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
- _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
- _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
- _mesa_DepthMask(GL_FALSE);
- _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
- mask &= ~GL_COLOR_BUFFER_BIT;
- }
-
- if ((mask & GL_DEPTH_BUFFER_BIT) &&
- _mesa_is_desktop_gl(ctx) &&
- ctx->Extensions.ARB_depth_texture &&
- ctx->Extensions.ARB_fragment_program) {
-
- GLuint *tmp = malloc(srcW * srcH * sizeof(GLuint));
-
- if (tmp) {
-
- newTex = _mesa_meta_alloc_texture(depthTex, srcW, srcH,
- GL_DEPTH_COMPONENT);
- _mesa_ReadPixels(srcX, srcY, srcW, srcH, GL_DEPTH_COMPONENT,
- GL_UNSIGNED_INT, tmp);
- _mesa_meta_setup_drawpix_texture(ctx, depthTex, newTex,
- srcW, srcH, GL_DEPTH_COMPONENT,
- GL_UNSIGNED_INT, tmp);
-
- /* texcoords (after texture allocation!) */
- {
- verts[0].tex[0] = 0.0F;
- verts[0].tex[1] = 0.0F;
- verts[1].tex[0] = depthTex->Sright;
- verts[1].tex[1] = 0.0F;
- verts[2].tex[0] = depthTex->Sright;
- verts[2].tex[1] = depthTex->Ttop;
- verts[3].tex[0] = 0.0F;
- verts[3].tex[1] = depthTex->Ttop;
-
- /* upload new vertex data */
- _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
- }
-
- if (!blit->DepthFP)
- init_blit_depth_pixels(ctx);
-
- _mesa_BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
- _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
- _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
- _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
- _mesa_DepthFunc(GL_ALWAYS);
- _mesa_DepthMask(GL_TRUE);
-
- _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
- _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
- _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
- mask &= ~GL_DEPTH_BUFFER_BIT;
-
- free(tmp);
- }
- }
-
- if (mask & GL_STENCIL_BUFFER_BIT) {
- /* XXX can't easily do stencil */
- }
-
- if (_mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES)
- _mesa_set_enable(ctx, tex->Target, GL_FALSE);
-
- _mesa_meta_end(ctx);
-
- if (mask) {
- _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
- dstX0, dstY0, dstX1, dstY1, mask, filter);
- }
-}
-
-void
-_mesa_meta_glsl_blit_cleanup(struct blit_state *blit)
-{
- if (blit->VAO) {
- _mesa_DeleteVertexArrays(1, &blit->VAO);
- blit->VAO = 0;
- _mesa_DeleteBuffers(1, &blit->VBO);
- blit->VBO = 0;
- }
- if (blit->DepthFP) {
- _mesa_DeleteProgramsARB(1, &blit->DepthFP);
- blit->DepthFP = 0;
- }
-
- _mesa_meta_blit_shader_table_cleanup(&blit->shaders);
-
- _mesa_DeleteTextures(1, &blit->depthTex.TexObj);
- blit->depthTex.TexObj = 0;
-}
-
-
/**
* Meta implementation of ctx->Driver.Clear() in terms of polygon rendering.
*/
diff --git a/src/mesa/drivers/common/meta_blit.c b/src/mesa/drivers/common/meta_blit.c
new file mode 100644
index 0000000..fa7e406
--- /dev/null
+++ b/src/mesa/drivers/common/meta_blit.c
@@ -0,0 +1,466 @@
+/*
+ * Mesa 3-D graphics library
+ *
+ * Copyright (C) 2009 VMware, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "main/glheader.h"
+#include "main/mtypes.h"
+#include "main/imports.h"
+#include "main/arbprogram.h"
+#include "main/arrayobj.h"
+#include "main/blend.h"
+#include "main/condrender.h"
+#include "main/depth.h"
+#include "main/enable.h"
+#include "main/fbobject.h"
+#include "main/macros.h"
+#include "main/matrix.h"
+#include "main/readpix.h"
+#include "main/shaderapi.h"
+#include "main/texobj.h"
+#include "main/texenv.h"
+#include "main/teximage.h"
+#include "main/texparam.h"
+#include "main/varray.h"
+#include "main/viewport.h"
+#include "swrast/swrast.h"
+#include "drivers/common/meta.h"
+#include "../glsl/ralloc.h"
+
+/** Return offset in bytes of the field within a vertex struct */
+#define OFFSET(FIELD) ((void *) offsetof(struct vertex, FIELD))
+
+/**
+ * One-time init for drawing depth pixels.
+ */
+static void
+init_blit_depth_pixels(struct gl_context *ctx)
+{
+ static const char *program =
+ "!!ARBfp1.0\n"
+ "TEX result.depth, fragment.texcoord[0], texture[0], %s; \n"
+ "END \n";
+ char program2[200];
+ struct blit_state *blit = &ctx->Meta->Blit;
+ struct temp_texture *tex = _mesa_meta_get_temp_texture(ctx);
+ const char *texTarget;
+
+ assert(blit->DepthFP == 0);
+
+ /* replace %s with "RECT" or "2D" */
+ assert(strlen(program) + 4 < sizeof(program2));
+ if (tex->Target == GL_TEXTURE_RECTANGLE)
+ texTarget = "RECT";
+ else
+ texTarget = "2D";
+ _mesa_snprintf(program2, sizeof(program2), program, texTarget);
+
+ _mesa_GenProgramsARB(1, &blit->DepthFP);
+ _mesa_BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
+ _mesa_ProgramStringARB(GL_FRAGMENT_PROGRAM_ARB, GL_PROGRAM_FORMAT_ASCII_ARB,
+ strlen(program2), (const GLubyte *) program2);
+}
+
+static void
+setup_glsl_blit_framebuffer(struct gl_context *ctx,
+ struct blit_state *blit,
+ GLenum target)
+{
+ /* target = GL_TEXTURE_RECTANGLE is not supported in GLES 3.0 */
+ assert(_mesa_is_desktop_gl(ctx) || target == GL_TEXTURE_2D);
+
+ _mesa_meta_setup_vertex_objects(&blit->VAO, &blit->VBO, true, 2, 2, 0);
+
+ _mesa_meta_setup_blit_shader(ctx, target, &blit->shaders);
+}
+
+/**
+ * Try to do a glBlitFramebuffer using no-copy texturing.
+ * We can do this when the src renderbuffer is actually a texture.
+ *
+ * \return new buffer mask indicating the buffers left to blit using the
+ * normal path.
+ */
+static GLbitfield
+blitframebuffer_texture(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield mask, GLenum filter, GLint flipX,
+ GLint flipY, GLboolean glsl_version)
+{
+ if (mask & GL_COLOR_BUFFER_BIT) {
+ const struct gl_framebuffer *readFb = ctx->ReadBuffer;
+ const struct gl_renderbuffer_attachment *readAtt =
+ &readFb->Attachment[readFb->_ColorReadBufferIndex];
+
+ if (readAtt && readAtt->Texture) {
+ struct blit_state *blit = &ctx->Meta->Blit;
+ const GLint dstX = MIN2(dstX0, dstX1);
+ const GLint dstY = MIN2(dstY0, dstY1);
+ const GLint dstW = abs(dstX1 - dstX0);
+ const GLint dstH = abs(dstY1 - dstY0);
+ const struct gl_texture_object *texObj = readAtt->Texture;
+ const GLuint srcLevel = readAtt->TextureLevel;
+ const GLint baseLevelSave = texObj->BaseLevel;
+ const GLint maxLevelSave = texObj->MaxLevel;
+ const GLenum target = texObj->Target;
+ GLuint sampler, samplerSave =
+ ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler ?
+ ctx->Texture.Unit[ctx->Texture.CurrentUnit].Sampler->Name : 0;
+
+ if (target != GL_TEXTURE_2D && target != GL_TEXTURE_RECTANGLE_ARB) {
+ /* Can't handle other texture types at this time */
+ return mask;
+ }
+
+ /* Choose between glsl version and fixed function version of
+ * BlitFramebuffer function.
+ */
+ if (glsl_version) {
+ setup_glsl_blit_framebuffer(ctx, blit, target);
+ }
+ else {
+ _mesa_meta_setup_ff_tnl_for_blit(&ctx->Meta->Blit.VAO,
+ &ctx->Meta->Blit.VBO,
+ 2);
+ }
+
+ _mesa_GenSamplers(1, &sampler);
+ _mesa_BindSampler(ctx->Texture.CurrentUnit, sampler);
+
+ /*
+ printf("Blit from texture!\n");
+ printf(" srcAtt %p dstAtt %p\n", readAtt, drawAtt);
+ printf(" srcTex %p dstText %p\n", texObj, drawAtt->Texture);
+ */
+
+ /* Prepare src texture state */
+ _mesa_BindTexture(target, texObj->Name);
+ _mesa_SamplerParameteri(sampler, GL_TEXTURE_MIN_FILTER, filter);
+ _mesa_SamplerParameteri(sampler, GL_TEXTURE_MAG_FILTER, filter);
+ if (target != GL_TEXTURE_RECTANGLE_ARB) {
+ _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, srcLevel);
+ _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, srcLevel);
+ }
+ _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ _mesa_SamplerParameteri(sampler, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+
+ /* Always do our blits with no sRGB decode or encode. Note that
+ * GL_FRAMEBUFFER_SRGB has already been disabled by
+ * _mesa_meta_begin().
+ */
+ if (ctx->Extensions.EXT_texture_sRGB_decode) {
+ _mesa_SamplerParameteri(sampler, GL_TEXTURE_SRGB_DECODE_EXT,
+ GL_SKIP_DECODE_EXT);
+ }
+
+ if (ctx->API == API_OPENGL_COMPAT || ctx->API == API_OPENGLES) {
+ _mesa_TexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
+ _mesa_set_enable(ctx, target, GL_TRUE);
+ }
+
+ /* Prepare vertex data (the VBO was previously created and bound) */
+ {
+ struct vertex verts[4];
+ GLfloat s0, t0, s1, t1;
+
+ if (target == GL_TEXTURE_2D) {
+ const struct gl_texture_image *texImage
+ = _mesa_select_tex_image(ctx, texObj, target, srcLevel);
+ s0 = srcX0 / (float) texImage->Width;
+ s1 = srcX1 / (float) texImage->Width;
+ t0 = srcY0 / (float) texImage->Height;
+ t1 = srcY1 / (float) texImage->Height;
+ }
+ else {
+ assert(target == GL_TEXTURE_RECTANGLE_ARB);
+ s0 = (float) srcX0;
+ s1 = (float) srcX1;
+ t0 = (float) srcY0;
+ t1 = (float) srcY1;
+ }
+
+ /* Silence valgrind warnings about reading uninitialized stack. */
+ memset(verts, 0, sizeof(verts));
+
+ /* setup vertex positions */
+ verts[0].x = -1.0F * flipX;
+ verts[0].y = -1.0F * flipY;
+ verts[1].x = 1.0F * flipX;
+ verts[1].y = -1.0F * flipY;
+ verts[2].x = 1.0F * flipX;
+ verts[2].y = 1.0F * flipY;
+ verts[3].x = -1.0F * flipX;
+ verts[3].y = 1.0F * flipY;
+
+ verts[0].tex[0] = s0;
+ verts[0].tex[1] = t0;
+ verts[1].tex[0] = s1;
+ verts[1].tex[1] = t0;
+ verts[2].tex[0] = s1;
+ verts[2].tex[1] = t1;
+ verts[3].tex[0] = s0;
+ verts[3].tex[1] = t1;
+
+ _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
+ }
+
+ /* setup viewport */
+ _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
+ _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+ _mesa_DepthMask(GL_FALSE);
+ _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
+
+ /* Restore texture object state, the texture binding will
+ * be restored by _mesa_meta_end().
+ */
+ if (target != GL_TEXTURE_RECTANGLE_ARB) {
+ _mesa_TexParameteri(target, GL_TEXTURE_BASE_LEVEL, baseLevelSave);
+ _mesa_TexParameteri(target, GL_TEXTURE_MAX_LEVEL, maxLevelSave);
+ }
+
+ _mesa_BindSampler(ctx->Texture.CurrentUnit, samplerSave);
+ _mesa_DeleteSamplers(1, &sampler);
+
+ /* Done with color buffer */
+ mask &= ~GL_COLOR_BUFFER_BIT;
+ }
+ }
+
+ return mask;
+}
+
+/**
+ * Meta implementation of ctx->Driver.BlitFramebuffer() in terms
+ * of texture mapping and polygon rendering.
+ */
+void
+_mesa_meta_BlitFramebuffer(struct gl_context *ctx,
+ GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
+ GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
+ GLbitfield mask, GLenum filter)
+{
+ struct blit_state *blit = &ctx->Meta->Blit;
+ struct temp_texture *tex = _mesa_meta_get_temp_texture(ctx);
+ struct temp_texture *depthTex = _mesa_meta_get_temp_depth_texture(ctx);
+ const GLsizei maxTexSize = tex->MaxSize;
+ const GLint srcX = MIN2(srcX0, srcX1);
+ const GLint srcY = MIN2(srcY0, srcY1);
+ const GLint srcW = abs(srcX1 - srcX0);
+ const GLint srcH = abs(srcY1 - srcY0);
+ const GLint dstX = MIN2(dstX0, dstX1);
+ const GLint dstY = MIN2(dstY0, dstY1);
+ const GLint dstW = abs(dstX1 - dstX0);
+ const GLint dstH = abs(dstY1 - dstY0);
+ const GLint srcFlipX = (srcX1 - srcX0) / srcW;
+ const GLint srcFlipY = (srcY1 - srcY0) / srcH;
+ const GLint dstFlipX = (dstX1 - dstX0) / dstW;
+ const GLint dstFlipY = (dstY1 - dstY0) / dstH;
+ const GLint flipX = srcFlipX * dstFlipX;
+ const GLint flipY = srcFlipY * dstFlipY;
+
+ struct vertex verts[4];
+ GLboolean newTex;
+ const GLboolean use_glsl_version = ctx->Extensions.ARB_vertex_shader &&
+ ctx->Extensions.ARB_fragment_shader &&
+ (ctx->API != API_OPENGLES);
+
+ /* In addition to falling back if the blit size is larger than the maximum
+ * texture size, fallback if the source is multisampled. This fallback can
+ * be removed once Mesa gets support ARB_texture_multisample.
+ */
+ if (srcW > maxTexSize || srcH > maxTexSize
+ || ctx->ReadBuffer->Visual.samples > 0) {
+ /* XXX avoid this fallback */
+ _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1, mask, filter);
+ return;
+ }
+
+ /* only scissor effects blit so save/clear all other relevant state */
+ _mesa_meta_begin(ctx, ~MESA_META_SCISSOR);
+
+ /* Try faster, direct texture approach first */
+ mask = blitframebuffer_texture(ctx, srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1, mask, filter,
+ dstFlipX, dstFlipY, use_glsl_version);
+ if (mask == 0x0) {
+ _mesa_meta_end(ctx);
+ return;
+ }
+
+ /* Choose between glsl version and fixed function version of
+ * BlitFramebuffer function.
+ */
+ if (use_glsl_version) {
+ setup_glsl_blit_framebuffer(ctx, blit, tex->Target);
+ }
+ else {
+ _mesa_meta_setup_ff_tnl_for_blit(&blit->VAO, &blit->VBO, 2);
+ }
+
+ /* Silence valgrind warnings about reading uninitialized stack. */
+ memset(verts, 0, sizeof(verts));
+
+ /* Continue with "normal" approach which involves copying the src rect
+ * into a temporary texture and is "blitted" by drawing a textured quad.
+ */
+ {
+ /* setup vertex positions */
+ verts[0].x = -1.0F * flipX;
+ verts[0].y = -1.0F * flipY;
+ verts[1].x = 1.0F * flipX;
+ verts[1].y = -1.0F * flipY;
+ verts[2].x = 1.0F * flipX;
+ verts[2].y = 1.0F * flipY;
+ verts[3].x = -1.0F * flipX;
+ verts[3].y = 1.0F * flipY;
+
+ }
+
+ /* glEnable() in gles2 and gles3 doesn't allow GL_TEXTURE_{1D, 2D, etc.}
+ * tokens.
+ */
+ if (_mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES)
+ _mesa_set_enable(ctx, tex->Target, GL_TRUE);
+
+ if (mask & GL_COLOR_BUFFER_BIT) {
+ const struct gl_framebuffer *readFb = ctx->ReadBuffer;
+ const struct gl_renderbuffer *colorReadRb = readFb->_ColorReadBuffer;
+ const GLenum rb_base_format =
+ _mesa_base_tex_format(ctx, colorReadRb->InternalFormat);
+
+ /* Using the exact source rectangle to create the texture does incorrect
+ * linear filtering along the edges. So, allocate the texture extended along
+ * edges by one pixel in x, y directions.
+ */
+ _mesa_meta_setup_copypix_texture(ctx, tex,
+ srcX - 1, srcY - 1, srcW + 2, srcH + 2,
+ rb_base_format, filter);
+ /* texcoords (after texture allocation!) */
+ {
+ verts[0].tex[0] = 1.0F;
+ verts[0].tex[1] = 1.0F;
+ verts[1].tex[0] = tex->Sright - 1.0F;
+ verts[1].tex[1] = 1.0F;
+ verts[2].tex[0] = tex->Sright - 1.0F;
+ verts[2].tex[1] = tex->Ttop - 1.0F;
+ verts[3].tex[0] = 1.0F;
+ verts[3].tex[1] = tex->Ttop - 1.0F;
+
+ /* upload new vertex data */
+ _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
+ }
+
+ _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
+ _mesa_ColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE);
+ _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_FALSE);
+ _mesa_DepthMask(GL_FALSE);
+ _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
+ mask &= ~GL_COLOR_BUFFER_BIT;
+ }
+
+ if ((mask & GL_DEPTH_BUFFER_BIT) &&
+ _mesa_is_desktop_gl(ctx) &&
+ ctx->Extensions.ARB_depth_texture &&
+ ctx->Extensions.ARB_fragment_program) {
+
+ GLuint *tmp = malloc(srcW * srcH * sizeof(GLuint));
+
+ if (tmp) {
+
+ newTex = _mesa_meta_alloc_texture(depthTex, srcW, srcH,
+ GL_DEPTH_COMPONENT);
+ _mesa_ReadPixels(srcX, srcY, srcW, srcH, GL_DEPTH_COMPONENT,
+ GL_UNSIGNED_INT, tmp);
+ _mesa_meta_setup_drawpix_texture(ctx, depthTex, newTex,
+ srcW, srcH, GL_DEPTH_COMPONENT,
+ GL_UNSIGNED_INT, tmp);
+
+ /* texcoords (after texture allocation!) */
+ {
+ verts[0].tex[0] = 0.0F;
+ verts[0].tex[1] = 0.0F;
+ verts[1].tex[0] = depthTex->Sright;
+ verts[1].tex[1] = 0.0F;
+ verts[2].tex[0] = depthTex->Sright;
+ verts[2].tex[1] = depthTex->Ttop;
+ verts[3].tex[0] = 0.0F;
+ verts[3].tex[1] = depthTex->Ttop;
+
+ /* upload new vertex data */
+ _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
+ }
+
+ if (!blit->DepthFP)
+ init_blit_depth_pixels(ctx);
+
+ _mesa_BindProgramARB(GL_FRAGMENT_PROGRAM_ARB, blit->DepthFP);
+ _mesa_set_enable(ctx, GL_FRAGMENT_PROGRAM_ARB, GL_TRUE);
+ _mesa_ColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE);
+ _mesa_set_enable(ctx, GL_DEPTH_TEST, GL_TRUE);
+ _mesa_DepthFunc(GL_ALWAYS);
+ _mesa_DepthMask(GL_TRUE);
+
+ _mesa_set_viewport(ctx, 0, dstX, dstY, dstW, dstH);
+ _mesa_BufferSubData(GL_ARRAY_BUFFER_ARB, 0, sizeof(verts), verts);
+ _mesa_DrawArrays(GL_TRIANGLE_FAN, 0, 4);
+ mask &= ~GL_DEPTH_BUFFER_BIT;
+
+ free(tmp);
+ }
+ }
+
+ if (mask & GL_STENCIL_BUFFER_BIT) {
+ /* XXX can't easily do stencil */
+ }
+
+ if (_mesa_is_desktop_gl(ctx) || ctx->API == API_OPENGLES)
+ _mesa_set_enable(ctx, tex->Target, GL_FALSE);
+
+ _mesa_meta_end(ctx);
+
+ if (mask) {
+ _swrast_BlitFramebuffer(ctx, srcX0, srcY0, srcX1, srcY1,
+ dstX0, dstY0, dstX1, dstY1, mask, filter);
+ }
+}
+
+void
+_mesa_meta_glsl_blit_cleanup(struct blit_state *blit)
+{
+ if (blit->VAO) {
+ _mesa_DeleteVertexArrays(1, &blit->VAO);
+ blit->VAO = 0;
+ _mesa_DeleteBuffers(1, &blit->VBO);
+ blit->VBO = 0;
+ }
+ if (blit->DepthFP) {
+ _mesa_DeleteProgramsARB(1, &blit->DepthFP);
+ blit->DepthFP = 0;
+ }
+
+ _mesa_meta_blit_shader_table_cleanup(&blit->shaders);
+
+ _mesa_DeleteTextures(1, &blit->depthTex.TexObj);
+ blit->depthTex.TexObj = 0;
+}
More information about the mesa-commit
mailing list