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Close issue #480: Extending Canvas support to cards without packed depth stencil.

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This commit is contained in:
vrld
2012-10-01 22:06:56 +02:00
parent e35854acdc
commit a39ddc9f1a
1 changed files with 67 additions and 15 deletions
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src/modules/graphics/opengl/Canvas.cpp
+67 -15
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@@ -75,27 +75,27 @@ struct FramebufferStrategyGL3 : public FramebufferStrategy
glBindRenderbuffer(GL_RENDERBUFFER, depth_stencil);
glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_STENCIL, width, height);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_STENCIL_ATTACHMENT,
GL_RENDERBUFFER, depth_stencil);
GL_RENDERBUFFER, depth_stencil);
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT,
GL_RENDERBUFFER, depth_stencil);
GL_RENDERBUFFER, depth_stencil);
// generate texture save target
glGenTextures(1, &img);
bindTexture(img);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height,
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA,
GL_UNSIGNED_BYTE, NULL);
bindTexture(0);
glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
GL_TEXTURE_2D, img, 0);
GL_TEXTURE_2D, img, 0);
// check status
GLenum status = glCheckFramebufferStatus(GL_FRAMEBUFFER);
// unbind framebuffer
glBindRenderbuffer(GL_RENDERBUFFER, 0);
glBindFramebuffer(GL_FRAMEBUFFER, (GLuint)current_fbo);
glBindFramebuffer(GL_FRAMEBUFFER, (GLuint) current_fbo);
return status;
}
virtual void deleteFBO(GLuint framebuffer, GLuint depth_stencil, GLuint img)
@@ -111,9 +111,8 @@ struct FramebufferStrategyGL3 : public FramebufferStrategy
}
};
struct FramebufferStrategyEXT : public FramebufferStrategy
struct FramebufferStrategyPackedEXT : public FramebufferStrategy
{
virtual GLenum createFBO(GLuint &framebuffer, GLuint &depth_stencil, GLuint &img, int width, int height)
{
GLint current_fbo;
@@ -126,29 +125,30 @@ struct FramebufferStrategyEXT : public FramebufferStrategy
// create stencil buffer
glGenRenderbuffersEXT(1, &depth_stencil);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, depth_stencil);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_STENCIL_EXT, width, height);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_STENCIL_EXT,
width, height);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, depth_stencil);
GL_RENDERBUFFER_EXT, depth_stencil);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, depth_stencil);
GL_RENDERBUFFER_EXT, depth_stencil);
// generate texture save target
glGenTextures(1, &img);
bindTexture(img);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height,
0, GL_RGBA, GL_UNSIGNED_BYTE, NULL);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA,
GL_UNSIGNED_BYTE, NULL);
bindTexture(0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, img, 0);
GL_TEXTURE_2D, img, 0);
// check status
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
// unbind framebuffer
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, (GLuint)current_fbo);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, (GLuint) current_fbo);
return status;
}
@@ -165,12 +165,62 @@ struct FramebufferStrategyEXT : public FramebufferStrategy
}
};
struct FramebufferStrategyEXT : public FramebufferStrategyPackedEXT
{
virtual GLenum createFBO(GLuint &framebuffer, GLuint &stencil, GLuint &img, int width, int height)
{
GLint current_fbo;
glGetIntegerv(GL_DRAW_FRAMEBUFFER_BINDING_EXT, &current_fbo);
// create framebuffer
glGenFramebuffersEXT(1, &framebuffer);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, framebuffer);
// create stencil buffer
glGenRenderbuffersEXT(1, &stencil);
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, stencil);
glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_STENCIL_INDEX,
width, height);
glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_STENCIL_ATTACHMENT_EXT,
GL_RENDERBUFFER_EXT, stencil);
// generate texture save target
glGenTextures(1, &img);
bindTexture(img);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, width, height, 0, GL_RGBA,
GL_UNSIGNED_BYTE, NULL);
bindTexture(0);
glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, img, 0);
// check status
GLenum status = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
// unbind framebuffer
glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, 0);
glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, (GLuint) current_fbo);
return status;
}
bool isSupported()
{
GLuint fb, stencil, img;
GLenum status = createFBO(fb, stencil, img, 2, 2);
deleteFBO(fb, stencil, img);
return status == GL_FRAMEBUFFER_COMPLETE;
}
};
FramebufferStrategy *strategy = NULL;
FramebufferStrategy strategyNone;
FramebufferStrategyGL3 strategyGL3;
FramebufferStrategyPackedEXT strategyPackedEXT;
FramebufferStrategyEXT strategyEXT;
Canvas *Canvas::current = NULL;
@@ -182,6 +232,8 @@ static void loadStrategy()
if (GLEE_VERSION_3_0 || GLEE_ARB_framebuffer_object)
strategy = &strategyGL3;
else if (GLEE_EXT_framebuffer_object && GLEE_EXT_packed_depth_stencil)
strategy = &strategyPackedEXT;
else if (GLEE_EXT_framebuffer_object && strategyEXT.isSupported())
strategy = &strategyEXT;
else
strategy = &strategyNone;