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Code Issues Releases Wiki Activity

rework ScreenTransition to use VBO

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fgenesis 2025-03-12 03:35:56 +01:00
parent 854afdda3f
commit 7b7681ffb6
3 changed files with 40 additions and 16 deletions
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1
Aquaria/DSQ.cpp
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@ -4161,6 +4161,7 @@ void AquariaScreenTransition::capture()
glReadBuffer(GL_BACK);
glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, width, height);
updateVBO();
dsq->cursor->alpha = oldAlpha;
dsq->renderExternal();

50
BBGE/ScreenTransition.cpp
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@ -24,6 +24,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#include "RenderBase.h"
ScreenTransition::ScreenTransition() : RenderObject()
, vbo(GPUBUF_VERTEXBUF | GPUBUF_DYNAMIC)
{
screen_texture = 0;
cull = false;
@ -55,6 +56,8 @@ void ScreenTransition::createTexture()
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER, GL_LINEAR); //GL_NEAREST); //GL_NEAREST);
glTexImage2D(GL_TEXTURE_2D,0,GL_RGB, textureWidth, textureHeight, 0 , GL_RGB, GL_UNSIGNED_BYTE, NULL);
glBindTexture(GL_TEXTURE_2D,0);
updateVBO();
}
void ScreenTransition::destroyTexture()
@ -66,6 +69,35 @@ void ScreenTransition::destroyTexture()
}
}
void ScreenTransition::updateVBO()
{
const float width2 = float(width)/2;
const float height2 = float(height)/2;
const float pw = float(windowWidth)/float(textureWidth);
const float ph = float(windowHeight)/float(textureHeight);
size_t bytes = 4 * (2+2) * sizeof(float);
do
{
float *p = (float*)vbo.beginWrite(GPUBUFTYPE_VEC2_TC, bytes, GPUACCESS_DEFAULT);
*p++ = width2; *p++ = height2;
*p++ = pw; *p++ = 0;
*p++ = -width2; *p++ = height2;
*p++ = 0; *p++ = 0;
*p++ = width2; *p++ = -height2;
*p++ = pw; *p++ = ph;
*p++ = -width2; *p++ = -height2;
*p++ = 0; *p++ = ph;
}
while(!vbo.commitWrite());
}
void ScreenTransition::unloadDevice()
{
RenderObject::unloadDevice();
@ -116,24 +148,10 @@ void ScreenTransition::onRender(const RenderState& rs) const
{
if (alpha.x == 0) return;
float width2 = float(width)/2;
float height2 = float(height)/2;
const float pw = float(windowWidth)/float(textureWidth);
const float ph = float(windowHeight)/float(textureHeight);
glBindTexture(GL_TEXTURE_2D, screen_texture);
glBegin(GL_QUADS);
glTexCoord2f(0, 0);
glVertex3f(-width2, height2, 0.0);
glTexCoord2f(pw, 0);
glVertex3f( width2, height2, 0.0);
glTexCoord2f(pw, ph);
glVertex3f( width2, -height2, 0.0);
glTexCoord2f(0, ph);
glVertex3f(-width2, -height2, 0.0);
glEnd();
vbo.apply();
glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
glBindTexture(GL_TEXTURE_2D, 0);

5
BBGE/ScreenTransition.h
View file

@ -22,6 +22,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#define SCREENTRANSITION_H
#include "RenderObject.h"
#include "VertexBuffer.h"
class ScreenTransition : public RenderObject
{
@ -36,6 +37,7 @@ public:
protected:
void createTexture();
void destroyTexture();
void updateVBO();
int textureWidth, textureHeight;
int windowWidth, windowHeight;
void onRender(const RenderState& rs) const OVERRIDE;
@ -43,6 +45,9 @@ protected:
unsigned screen_texture;
private:
DynamicGPUBuffer vbo;
};
#endif