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begin implementing OpenGL 1.0 engine

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* option to pass -opengl1 or -opengl2 as argument
* note that with this commit there are a lot of graphics regressions and the master will remaing unstable for a while
* shaders disabled for a while
This commit is contained in:
Eduardo Bart
2012-04-18 20:03:43 -03:00
parent a4a00a49fe
commit 58d76e255d
46 changed files with 1303 additions and 510 deletions
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224
src/framework/graphics/painter.cpp
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@@ -21,162 +21,132 @@
*/
#include "painter.h"
#include "texture.h"
#include "paintershadersources.h"
#include "paintershaderprogram.h"
#include "shaderprogram.h"
#include "graphics.h"
#include "vertexarray.h"
Painter g_painter;
Painter *g_painter = nullptr;
void Painter::init()
Painter::Painter()
{
setColor(Color::white);
setOpacity(1.0f);
setCompositionMode(CompositionMode_Normal);
releaseCustomProgram();
m_drawTexturedProgram = PainterShaderProgramPtr(new PainterShaderProgram);
m_drawTexturedProgram->addShaderFromSourceCode(Shader::Vertex, glslMainWithTexCoordsVertexShader + glslPositionOnlyVertexShader);
m_drawTexturedProgram->addShaderFromSourceCode(Shader::Fragment, glslMainFragmentShader + glslTextureSrcFragmentShader);
m_drawTexturedProgram->link();
m_drawSolidColorProgram = PainterShaderProgramPtr(new PainterShaderProgram);
m_drawSolidColorProgram->addShaderFromSourceCode(Shader::Vertex, glslMainVertexShader + glslPositionOnlyVertexShader);
m_drawSolidColorProgram->addShaderFromSourceCode(Shader::Fragment, glslMainFragmentShader + glslSolidColorFragmentShader);
m_drawSolidColorProgram->link();
m_glTextureId = 0;
m_oldStateIndex = 0;
m_color = Color::white;
m_opacity = 1.0f;
m_compositionMode = CompositionMode_Normal;
m_shaderProgram = nullptr;
m_texture = nullptr;
}
void Painter::terminate()
void Painter::resetState()
{
m_drawTexturedProgram.reset();
m_drawSolidColorProgram.reset();
resetColor();
resetOpacity();
resetCompositionMode();
resetClipRect();
resetShaderProgram();
resetTexture();
}
void Painter::drawProgram(PainterShaderProgram *program, CoordsBuffer& coordsBuffer, PainterShaderProgram::DrawMode drawMode)
void Painter::refreshState()
{
if(coordsBuffer.getVertexCount() == 0)
return;
program->setProjectionMatrix(m_projectionMatrix);
program->setOpacity(m_opacity);
program->setColor(m_color);
program->draw(coordsBuffer, drawMode);
updateGlCompositionMode();
updateGlClipRect();
updateGlTexture();
}
void Painter::drawTextureCoords(CoordsBuffer& coordsBuffer, const TexturePtr& texture)
void Painter::saveAndResetState()
{
PainterShaderProgram *program = m_customProgram ? m_customProgram : m_drawTexturedProgram.get();
program->setTexture(texture);
drawProgram(program, coordsBuffer);
assert(m_oldStateIndex<10);
m_olderStates[m_oldStateIndex].projectionMatrix = m_projectionMatrix;
m_olderStates[m_oldStateIndex].textureMatrix = m_textureMatrix;
m_olderStates[m_oldStateIndex].color = m_color;
m_olderStates[m_oldStateIndex].opacity = m_opacity;
m_olderStates[m_oldStateIndex].compositionMode = m_compositionMode;
m_olderStates[m_oldStateIndex].clipRect = m_clipRect;
m_olderStates[m_oldStateIndex].shaderProgram = m_shaderProgram;
m_olderStates[m_oldStateIndex].texture = m_texture;
m_oldStateIndex++;
resetState();
}
void Painter::drawTexturedRect(const Rect& dest, const TexturePtr& texture, const Rect& src)
void Painter::restoreSavedState()
{
if(dest.isEmpty() || src.isEmpty() || !texture->getId())
return;
m_coordsBuffer.clear();
m_coordsBuffer.addQuad(dest, src);
PainterShaderProgram *program = m_customProgram ? m_customProgram : m_drawTexturedProgram.get();
program->setTexture(texture);
drawProgram(program, m_coordsBuffer, PainterShaderProgram::TriangleStrip);
}
void Painter::drawRepeatedTexturedRect(const Rect& dest, const TexturePtr& texture, const Rect& src)
{
if(dest.isEmpty() || src.isEmpty() || !texture->getId())
return;
m_coordsBuffer.clear();
m_coordsBuffer.addRepeatedRects(dest, src);
drawTextureCoords(m_coordsBuffer, texture);
}
void Painter::drawFilledRect(const Rect& dest)
{
if(dest.isEmpty())
return;
m_coordsBuffer.clear();
m_coordsBuffer.addRect(dest);
drawProgram(m_customProgram ? m_customProgram : m_drawSolidColorProgram.get(), m_coordsBuffer);
}
void Painter::drawBoundingRect(const Rect& dest, int innerLineWidth)
{
if(dest.isEmpty() || innerLineWidth == 0)
return;
m_coordsBuffer.clear();
m_coordsBuffer.addBoudingRect(dest, innerLineWidth);
drawProgram(m_customProgram ? m_customProgram : m_drawSolidColorProgram.get(), m_coordsBuffer);
m_oldStateIndex--;
setProjectionMatrix(m_olderStates[m_oldStateIndex].projectionMatrix);
setTextureMatrix(m_olderStates[m_oldStateIndex].textureMatrix);
setColor(m_olderStates[m_oldStateIndex].color);
setOpacity(m_olderStates[m_oldStateIndex].opacity);
setCompositionMode(m_olderStates[m_oldStateIndex].compositionMode);
setClipRect(m_olderStates[m_oldStateIndex].clipRect);
setShaderProgram(m_olderStates[m_oldStateIndex].shaderProgram);
setTexture(m_olderStates[m_oldStateIndex].texture);
}
void Painter::setCompositionMode(Painter::CompositionMode compositionMode)
{
switch(compositionMode) {
case CompositionMode_Normal:
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
break;
case CompositionMode_Multiply:
glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA);
break;
case CompositionMode_Add:
glBlendFunc(GL_ONE, GL_ONE);
break;
case CompositionMode_Replace:
glBlendFunc(GL_ONE, GL_ZERO);
break;
case CompositionMode_DestBlending:
glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
break;
}
m_compostionMode = compositionMode;
if(m_compositionMode == compositionMode)
return;
m_compositionMode = compositionMode;
updateGlCompositionMode();
}
void Painter::setClipRect(const Rect& clipRect)
{
if(m_clipRect == clipRect)
return;
m_clipRect = clipRect;
updateGlClipRect();
}
if(clipRect.isValid()) {
void Painter::setTexture(Texture* texture)
{
if(m_texture == texture)
return;
m_texture = texture;
if(texture) {
m_glTextureId = texture->getId();
setTextureMatrix(texture->getTransformMatrix());
} else
m_glTextureId = 0;
m_texture = texture;
updateGlTexture();
}
void Painter::updateGlTexture()
{
glBindTexture(GL_TEXTURE_2D, m_glTextureId);
}
void Painter::updateGlCompositionMode()
{
glEnable(GL_BLEND);
switch(m_compositionMode) {
case CompositionMode_Normal:
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
break;
case CompositionMode_Multiply:
glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA);
break;
case CompositionMode_Add:
glBlendFunc(GL_ONE, GL_ONE);
break;
case CompositionMode_Replace:
glBlendFunc(GL_ONE, GL_ZERO);
break;
case CompositionMode_DestBlending:
glBlendFunc(GL_ONE_MINUS_DST_ALPHA, GL_DST_ALPHA);
break;
}
}
void Painter::updateGlClipRect()
{
if(m_clipRect.isValid()) {
glEnable(GL_SCISSOR_TEST);
glScissor(clipRect.left(), g_graphics.getViewportSize().height() - clipRect.bottom() - 1, clipRect.width(), clipRect.height());
glScissor(m_clipRect.left(), g_graphics.getViewportSize().height() - m_clipRect.bottom() - 1, m_clipRect.width(), m_clipRect.height());
} else {
glDisable(GL_SCISSOR_TEST);
}
m_clipRect = clipRect;
}
void Painter::saveAndResetState()
{
m_oldCustomProgram = m_customProgram;
m_oldProjectionMatrix = m_projectionMatrix;
m_oldColor = m_color;
m_oldOpacity = m_opacity;
m_oldCompostionMode = m_compostionMode;
m_oldClipRect = m_clipRect;
releaseCustomProgram();
resetClipRect();
setColor(Color::white);
setOpacity(1);
setCompositionMode(CompositionMode_Normal);
}
void Painter::restoreSavedState()
{
m_customProgram = m_oldCustomProgram;
setColor(m_oldColor);
setOpacity(m_oldOpacity);
setCompositionMode(m_oldCompostionMode);
setClipRect(m_oldClipRect);
m_oldCustomProgram = nullptr;
m_oldColor = Color::white;
m_oldOpacity = 1;
m_oldCompostionMode = CompositionMode_Normal;
m_oldClipRect = Rect();
}