void RenderTarget::pushGLStates()
{
if (setActive(true))
{
#ifdef SFML_DEBUG
// make sure that the user didn't leave an unchecked OpenGL error
GLenum error = glGetError();
if (error != GL_NO_ERROR)
{
err() << "OpenGL error (" << error << ") detected in user code, "
<< "you should check for errors with glGetError()"
<< std::endl;
}
#endif
#ifndef SFML_OPENGL_ES
glCheck(glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS));
glCheck(glPushAttrib(GL_ALL_ATTRIB_BITS));
#endif
glCheck(glMatrixMode(GL_MODELVIEW));
glCheck(glPushMatrix());
glCheck(glMatrixMode(GL_PROJECTION));
glCheck(glPushMatrix());
glCheck(glMatrixMode(GL_TEXTURE));
glCheck(glPushMatrix());
}
resetGLStates();
}
// -----------------------------------------------------------------------------
// Activates the GL context for this canvas.
// Returns false if setting the active context failed
// -----------------------------------------------------------------------------
bool OGLCanvas::setActive()
{
#ifdef USE_SFML_RENDERWINDOW
if (!sf::RenderWindow::setActive())
return false;
Drawing::setRenderTarget(this);
resetGLStates();
setView(sf::View(sf::FloatRect(0.0f, 0.0f, GetSize().x, GetSize().y)));
return true;
#else
return setContext();
#endif
}
void RenderTarget::pushGLStates()
{
if (activate(true))
{
glCheck(glPushClientAttrib(GL_CLIENT_ALL_ATTRIB_BITS));
glCheck(glPushAttrib(GL_ALL_ATTRIB_BITS));
glCheck(glMatrixMode(GL_MODELVIEW));
glCheck(glPushMatrix());
glCheck(glMatrixMode(GL_PROJECTION));
glCheck(glPushMatrix());
glCheck(glMatrixMode(GL_TEXTURE));
glCheck(glPushMatrix());
}
resetGLStates();
}
void RenderTarget::draw(const Vertex* vertices, std::size_t vertexCount,
PrimitiveType type, const RenderStates& states)
{
// Nothing to draw?
if (!vertices || (vertexCount == 0))
return;
// GL_QUADS is unavailable on OpenGL ES
#ifdef SFML_OPENGL_ES
if (type == Quads)
{
err() << "sf::Quads primitive type is not supported on OpenGL ES platforms, drawing skipped" << std::endl;
return;
}
#define GL_QUADS 0
#endif
if (setActive(true))
{
// First set the persistent OpenGL states if it's the very first call
if (!m_cache.glStatesSet)
resetGLStates();
// Check if the vertex count is low enough so that we can pre-transform them
bool useVertexCache = (vertexCount <= StatesCache::VertexCacheSize);
if (useVertexCache)
{
// Pre-transform the vertices and store them into the vertex cache
for (std::size_t i = 0; i < vertexCount; ++i)
{
Vertex& vertex = m_cache.vertexCache[i];
vertex.position = states.transform * vertices[i].position;
vertex.color = vertices[i].color;
vertex.texCoords = vertices[i].texCoords;
}
// Since vertices are transformed, we must use an identity transform to render them
if (!m_cache.useVertexCache)
applyTransform(Transform::Identity);
}
else
{
applyTransform(states.transform);
}
// Apply the view
if (m_cache.viewChanged)
applyCurrentView();
// Apply the blend mode
if (states.blendMode != m_cache.lastBlendMode)
applyBlendMode(states.blendMode);
// Apply the texture
Uint64 textureId = states.texture ? states.texture->m_cacheId : 0;
if (textureId != m_cache.lastTextureId)
applyTexture(states.texture);
// Apply the shader
if (states.shader)
applyShader(states.shader);
// If we pre-transform the vertices, we must use our internal vertex cache
if (useVertexCache)
{
// ... and if we already used it previously, we don't need to set the pointers again
if (!m_cache.useVertexCache)
vertices = m_cache.vertexCache;
else
vertices = NULL;
}
// Check if texture coordinates array is needed, and update client state accordingly
bool enableTexCoordsArray = (states.texture || states.shader);
if (enableTexCoordsArray != m_cache.texCoordsArrayEnabled)
{
if (enableTexCoordsArray)
glCheck(glEnableClientState(GL_TEXTURE_COORD_ARRAY));
else
glCheck(glDisableClientState(GL_TEXTURE_COORD_ARRAY));
m_cache.texCoordsArrayEnabled = enableTexCoordsArray;
}
// Setup the pointers to the vertices' components
if (vertices)
{
const char* data = reinterpret_cast<const char*>(vertices);
glCheck(glVertexPointer(2, GL_FLOAT, sizeof(Vertex), data + 0));
glCheck(glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(Vertex), data + 8));
if (enableTexCoordsArray)
glCheck(glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), data + 12));
}
// Find the OpenGL primitive type
static const GLenum modes[] = {GL_POINTS, GL_LINES, GL_LINE_STRIP, GL_TRIANGLES,
GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_QUADS};
GLenum mode = modes[type];
// Draw the primitives
glCheck(glDrawArrays(mode, 0, vertexCount));
// Unbind the shader, if any
if (states.shader)
applyShader(NULL);
// If the texture we used to draw belonged to a RenderTexture, then forcibly unbind that texture.
// This prevents a bug where some drivers do not clear RenderTextures properly.
if (states.texture && states.texture->m_fboAttachment)
applyTexture(NULL);
// Update the cache
m_cache.useVertexCache = useVertexCache;
}
}
void sfRenderWindow_resetGLStates(sfRenderWindow* renderWindow)
{
CSFML_CALL(renderWindow, resetGLStates());
}
void sfRenderTexture_resetGLStates(sfRenderTexture* renderTexture)
{
CSFML_CALL(renderTexture, resetGLStates());
}
void RenderTarget::draw(const Vertex* vertices, unsigned int vertexCount,
PrimitiveType type, const RenderStates& states)
{
// Nothing to draw?
if (!vertices || (vertexCount == 0))
return;
if (activate(true))
{
// First set the persistent OpenGL states if it's the very first call
if (!m_cache.glStatesSet)
resetGLStates();
// Check if the vertex count is low enough so that we can pre-transform them
bool useVertexCache = (vertexCount <= StatesCache::VertexCacheSize);
if (useVertexCache)
{
// Pre-transform the vertices and store them into the vertex cache
for (unsigned int i = 0; i < vertexCount; ++i)
{
Vertex& vertex = m_cache.vertexCache[i];
vertex.position = states.transform * vertices[i].position;
vertex.color = vertices[i].color;
vertex.texCoords = vertices[i].texCoords;
}
// Since vertices are transformed, we must use an identity transform to render them
if (!m_cache.useVertexCache)
applyTransform(Transform::Identity);
}
else
{
applyTransform(states.transform);
}
// Apply the view
if (m_cache.viewChanged)
applyCurrentView();
// Apply the blend mode
if (states.blendMode != m_cache.lastBlendMode)
applyBlendMode(states.blendMode);
// Apply the texture
Uint64 textureId = states.texture ? states.texture->m_cacheId : 0;
if (textureId != m_cache.lastTextureId)
applyTexture(states.texture);
// Apply the shader
if (states.shader)
applyShader(states.shader);
// If we pre-transform the vertices, we must use our internal vertex cache
if (useVertexCache)
{
// ... and if we already used it previously, we don't need to set the pointers again
if (!m_cache.useVertexCache)
vertices = m_cache.vertexCache;
else
vertices = NULL;
}
// Setup the pointers to the vertices' components
if (vertices)
{
const char* data = reinterpret_cast<const char*>(vertices);
glCheck(glVertexPointer(2, GL_FLOAT, sizeof(Vertex), data + 0));
glCheck(glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(Vertex), data + 8));
glCheck(glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), data + 12));
}
// Find the OpenGL primitive type
static const GLenum modes[] = {GL_POINTS, GL_LINES, GL_LINE_STRIP, GL_TRIANGLES,
GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_QUADS
};
GLenum mode = modes[type];
// Draw the primitives
glCheck(glDrawArrays(mode, 0, vertexCount));
// Unbind the shader, if any
if (states.shader)
applyShader(NULL);
// Update the cache
m_cache.useVertexCache = useVertexCache;
}
}
void RenderTarget::draw(const Vertex* vertices, unsigned int vertexCount,
PrimitiveType type, const RenderStates& states)
{
// Nothing to draw?
if (!vertices || (vertexCount == 0))
return;
// Vertices allocated in the stack (common) can't be converted to physical address
#ifndef EMULATION
if (osConvertVirtToPhys((u32)vertices) == 0)
{
err() << "RenderTarget::draw() called with vertex array in inaccessible memory space." << std::endl;
return;
}
#endif
// GL_QUADS is unavailable on OpenGL ES
if (type == Quads)
{
err() << "cpp3ds::Quads primitive type is not supported on OpenGL ES platforms, drawing skipped" << std::endl;
return;
}
#define GL_QUADS 0
if (activate(true))
{
// First set the persistent OpenGL states if it's the very first call
if (!m_cache.glStatesSet)
resetGLStates();
// Check if the vertex count is low enough so that we can pre-transform them
bool useVertexCache = (vertexCount <= StatesCache::VertexCacheSize);
if (useVertexCache)
{
// Pre-transform the vertices and store them into the vertex cache
for (unsigned int i = 0; i < vertexCount; ++i)
{
Vertex& vertex = m_cache.vertexCache[i];
vertex.position = states.transform * vertices[i].position;
vertex.color = vertices[i].color;
vertex.texCoords = vertices[i].texCoords;
}
// Since vertices are transformed, we must use an identity transform to render them
if (!m_cache.useVertexCache)
applyTransform(Transform::Identity);
}
else
{
applyTransform(states.transform);
}
// Apply the view
if (m_cache.viewChanged)
applyCurrentView();
// Apply the blend mode
if (states.blendMode != m_cache.lastBlendMode)
applyBlendMode(states.blendMode);
// Apply the texture
Uint64 textureId = states.texture ? states.texture->m_cacheId : 0;
if (textureId != m_cache.lastTextureId)
applyTexture(states.texture);
// Apply the shader
if (states.shader)
applyShader(states.shader);
// If we pre-transform the vertices, we must use our internal vertex cache
if (useVertexCache)
{
// ... and if we already used it previously, we don't need to set the pointers again
if (!m_cache.useVertexCache)
vertices = m_cache.vertexCache;
else
vertices = NULL;
}
// Setup the pointers to the vertices' components
if (vertices)
{
#ifdef EMULATION
const char* data = reinterpret_cast<const char*>(vertices);
glCheck(glVertexPointer(2, GL_FLOAT, sizeof(Vertex), data + 0));
glCheck(glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(Vertex), data + 8)); // 8 = sizeof(Vector2f)
glCheck(glTexCoordPointer(2, GL_FLOAT, sizeof(Vertex), data + 12)); // 12 = 8 + sizeof(Color)
#else
// Temorary workaround until gl3ds can get VAO gl*Pointer functions working
u32 bufferOffsets[] = {0};
u64 bufferPermutations[] = {0x210};
u8 bufferAttribCounts[] = {3};
GPU_SetAttributeBuffers(
3, // number of attributes
(u32*)osConvertVirtToPhys((u32)vertices),
GPU_ATTRIBFMT(0, 2, GPU_FLOAT) | GPU_ATTRIBFMT(1, 4, GPU_UNSIGNED_BYTE) | GPU_ATTRIBFMT(2, 2, GPU_FLOAT),
0xFF8, //0b1100
0x210,
1, //number of buffers
bufferOffsets,
bufferPermutations,
bufferAttribCounts // number of attributes for each buffer
);
#endif
}
// Find the OpenGL primitive type
static const GLenum modes[] = {GL_POINTS, GL_LINES, GL_LINE_STRIP, GL_TRIANGLES,
GL_TRIANGLE_STRIP, GL_TRIANGLE_FAN, GL_QUADS
};
GLenum mode = modes[type];
// Draw the primitives
glCheck(glDrawArrays(mode, 0, vertexCount));
// Unbind the shader, if any
if (states.shader)
applyShader(NULL);
// Update the cache
m_cache.useVertexCache = useVertexCache;
}
}
