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some initial work on upcoming GL_EXT_framebuffer_blit extension

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This commit is contained in:
Brian Paul
2005-11-08 14:45:48 +00:00
parent 3e9c099088
commit 0bffb1192a
6 changed files with 202 additions and 27 deletions
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211
src/mesa/main/fbobject.c
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@@ -38,6 +38,14 @@
#include "texstore.h"
/* XXX temporarily here */
#define GL_READ_FRAMEBUFFER_EXT 0x90
#define GL_DRAW_FRAMEBUFFER_EXT 0x9a
#define GL_DRAW_FRAMEBUFFER_BINDING_EXT GL_FRAMEBUFFER_BINDING_EXT
#define GL_READ_FRAMEBUFFER_BINDING_EXT 0x9b
/**
* Notes:
*
@@ -871,12 +879,36 @@ _mesa_IsFramebufferEXT(GLuint framebuffer)
void GLAPIENTRY
_mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
{
struct gl_framebuffer *newFb, *newReadFb, *oldFb;
struct gl_framebuffer *newFb, *oldFb;
GLboolean bindReadBuf, bindDrawBuf;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (target != GL_FRAMEBUFFER_EXT) {
switch (target) {
#if FEATURE_EXT_framebuffer_blit
case GL_DRAW_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
return;
}
bindDrawBuf = GL_TRUE;
bindReadBuf = GL_FALSE;
break;
case GL_READ_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
return;
}
bindDrawBuf = GL_FALSE;
bindReadBuf = GL_TRUE;
break;
#endif
case GL_FRAMEBUFFER_EXT:
bindDrawBuf = GL_TRUE;
bindReadBuf = GL_TRUE;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glBindFramebufferEXT(target)");
return;
}
@@ -899,30 +931,41 @@ _mesa_BindFramebufferEXT(GLenum target, GLuint framebuffer)
}
_mesa_HashInsert(ctx->Shared->FrameBuffers, framebuffer, newFb);
}
newFb->RefCount++;
newReadFb = newFb;
if (bindReadBuf)
newFb->RefCount++;
if (bindDrawBuf)
newFb->RefCount++;
}
else {
/* Binding the window system framebuffer (which was originally set
* with MakeCurrent).
*/
newFb = ctx->WinSysDrawBuffer;
newReadFb = ctx->WinSysReadBuffer;
}
oldFb = ctx->DrawBuffer;
if (oldFb && oldFb->Name != 0) {
oldFb->RefCount--;
if (oldFb->RefCount == 0) {
oldFb->Delete(oldFb);
}
}
ASSERT(newFb != &DummyFramebuffer);
/* Note, we set both the GL_DRAW_BUFFER and GL_READ_BUFFER state: */
ctx->DrawBuffer = newFb;
ctx->ReadBuffer = newReadFb;
if (bindReadBuf) {
oldFb = ctx->ReadBuffer;
if (oldFb && oldFb->Name != 0) {
oldFb->RefCount--;
if (oldFb->RefCount == 0) {
oldFb->Delete(oldFb);
}
}
ctx->ReadBuffer = newFb;
}
if (bindDrawBuf) {
oldFb = ctx->DrawBuffer;
if (oldFb && oldFb->Name != 0) {
oldFb->RefCount--;
if (oldFb->RefCount == 0) {
oldFb->Delete(oldFb);
}
}
ctx->DrawBuffer = newFb;
}
}
@@ -1001,24 +1044,45 @@ _mesa_GenFramebuffersEXT(GLsizei n, GLuint *framebuffers)
GLenum GLAPIENTRY
_mesa_CheckFramebufferStatusEXT(GLenum target)
{
struct gl_framebuffer *buffer;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, 0);
if (target != GL_FRAMEBUFFER_EXT) {
switch (target) {
#if FEATURE_EXT_framebuffer_blit
case GL_DRAW_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
return 0;
}
buffer = ctx->DrawBuffer;
break;
case GL_READ_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
return 0;
}
buffer = ctx->ReadBuffer;
break;
#endif
case GL_FRAMEBUFFER_EXT:
buffer = ctx->DrawBuffer;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM, "glCheckFramebufferStatus(target)");
return 0; /* formerly GL_FRAMEBUFFER_STATUS_ERROR_EXT */
}
if (ctx->DrawBuffer->Name == 0) {
if (buffer->Name == 0) {
/* The window system / default framebuffer is always complete */
return GL_FRAMEBUFFER_COMPLETE_EXT;
}
FLUSH_VERTICES(ctx, _NEW_BUFFERS);
_mesa_test_framebuffer_completeness(ctx, ctx->DrawBuffer);
return ctx->DrawBuffer->_Status;
_mesa_test_framebuffer_completeness(ctx, buffer);
return buffer->_Status;
}
@@ -1086,6 +1150,7 @@ _mesa_FramebufferTexture1DEXT(GLenum target, GLenum attachment,
ASSERT(textarget == GL_TEXTURE_1D);
/* XXX read blit */
att = get_attachment(ctx, ctx->DrawBuffer, attachment);
if (att == NULL) {
_mesa_error(ctx, GL_INVALID_ENUM,
@@ -1231,12 +1296,35 @@ _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
GLuint renderbuffer)
{
struct gl_renderbuffer_attachment *att;
struct gl_framebuffer *fb;
struct gl_renderbuffer *rb;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (target != GL_FRAMEBUFFER_EXT) {
switch (target) {
#if FEATURE_EXT_framebuffer_blit
case GL_DRAW_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glFramebufferRenderbufferEXT(target)");
return;
}
fb = ctx->DrawBuffer;
break;
case GL_READ_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glFramebufferRenderbufferEXT(target)");
return;
}
fb = ctx->ReadBuffer;
break;
#endif
case GL_FRAMEBUFFER_EXT:
fb = ctx->DrawBuffer;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glFramebufferRenderbufferEXT(target)");
return;
@@ -1248,13 +1336,13 @@ _mesa_FramebufferRenderbufferEXT(GLenum target, GLenum attachment,
return;
}
if (ctx->DrawBuffer->Name == 0) {
if (fb->Name == 0) {
/* Can't attach new renderbuffers to a window system framebuffer */
_mesa_error(ctx, GL_INVALID_OPERATION, "glFramebufferRenderbufferEXT");
return;
}
att = get_attachment(ctx, ctx->DrawBuffer, attachment);
att = get_attachment(ctx, fb, attachment);
if (att == NULL) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glFramebufferRenderbufferEXT(attachment)");
@@ -1286,23 +1374,46 @@ _mesa_GetFramebufferAttachmentParameterivEXT(GLenum target, GLenum attachment,
GLenum pname, GLint *params)
{
const struct gl_renderbuffer_attachment *att;
struct gl_framebuffer *buffer;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
if (target != GL_FRAMEBUFFER_EXT) {
switch (target) {
#if FEATURE_EXT_framebuffer_blit
case GL_DRAW_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetFramebufferAttachmentParameterivEXT(target)");
return;
}
buffer = ctx->DrawBuffer;
break;
case GL_READ_FRAMEBUFFER_EXT:
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetFramebufferAttachmentParameterivEXT(target)");
return;
}
buffer = ctx->ReadBuffer;
break;
#endif
case GL_FRAMEBUFFER_EXT:
buffer = ctx->DrawBuffer;
break;
default:
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetFramebufferAttachmentParameterivEXT(target)");
return;
}
if (ctx->DrawBuffer->Name == 0) {
if (buffer->Name == 0) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glGetFramebufferAttachmentParameterivEXT");
return;
}
att = get_attachment(ctx, ctx->DrawBuffer, attachment);
att = get_attachment(ctx, buffer, attachment);
if (att == NULL) {
_mesa_error(ctx, GL_INVALID_ENUM,
"glGetFramebufferAttachmentParameterivEXT(attachment)");
@@ -1390,3 +1501,51 @@ _mesa_GenerateMipmapEXT(GLenum target)
/* XXX this might not handle cube maps correctly */
_mesa_generate_mipmap(ctx, target, texUnit, texObj);
}
#if FEATURE_EXT_framebuffer_blit
void GLAPIENTRY
_mesa_BlitFramebufferEXT(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1,
GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
GLbitfield mask, GLenum filter)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END(ctx);
FLUSH_VERTICES(ctx, _NEW_BUFFERS);
/* check for complete framebuffers */
if (ctx->DrawBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT ||
ctx->ReadBuffer->_Status != GL_FRAMEBUFFER_COMPLETE_EXT) {
_mesa_error(ctx, GL_INVALID_FRAMEBUFFER_OPERATION_EXT,
"glBlitFramebufferEXT(incomplete draw/read buffers)");
return;
}
/* depth/stencil must be blitted with nearest filtering */
if ((mask & (GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT))
&& filter != GL_NEAREST) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBlitFramebufferEXT(depth/stencil requires GL_NEAREST filter");
return;
}
if (mask & ~(GL_COLOR_BUFFER_BIT |
GL_DEPTH_BUFFER_BIT |
GL_STENCIL_BUFFER_BIT)) {
_mesa_error( ctx, GL_INVALID_VALUE, "glBlitFramebufferEXT(mask)");
return;
}
if (!ctx->Extensions.EXT_framebuffer_blit) {
_mesa_error(ctx, GL_INVALID_OPERATION, "glBlitFramebufferEXT");
return;
}
ASSERT(ctx->Driver.BlitFramebuffer);
ctx->Driver.BlitFramebuffer(ctx,
srcX0, srcY0, srcX1, srcY1,
dstX0, dstY0, dstX1, dstY1,
mask, filter);
}
#endif /* FEATURE_EXT_framebuffer_blit */