diff options
Diffstat (limited to 'backends/graphics/opengl/pipelines/shader.cpp')
| -rw-r--r-- | backends/graphics/opengl/pipelines/shader.cpp | 26 |
1 files changed, 24 insertions, 2 deletions
diff --git a/backends/graphics/opengl/pipelines/shader.cpp b/backends/graphics/opengl/pipelines/shader.cpp index c7befe22b8..8e38458f73 100644 --- a/backends/graphics/opengl/pipelines/shader.cpp +++ b/backends/graphics/opengl/pipelines/shader.cpp @@ -28,15 +28,28 @@ namespace OpenGL { #if !USE_FORCED_GLES ShaderPipeline::ShaderPipeline(Shader *shader) - : _activeShader(shader) { + : _activeShader(shader), _colorAttributes() { _vertexAttribLocation = shader->getAttributeLocation("position"); _texCoordAttribLocation = shader->getAttributeLocation("texCoordIn"); _colorAttribLocation = shader->getAttributeLocation("blendColorIn"); + + assert(_vertexAttribLocation != -1); + assert(_texCoordAttribLocation != -1); + assert(_colorAttribLocation != -1); + + // One of the attributes needs to be passed through location 0, otherwise + // we get no output for GL contexts due to GL compatibility reasons. Let's + // check whether this ever happens. If this ever gets hit, we need to + // enable location 0 and pass some dummy values through it to fix output. + assert( _vertexAttribLocation == 0 + || _texCoordAttribLocation == 0 + || _colorAttribLocation == 0); } void ShaderPipeline::activateInternal() { GL_CALL(glEnableVertexAttribArray(_vertexAttribLocation)); GL_CALL(glEnableVertexAttribArray(_texCoordAttribLocation)); + GL_CALL(glEnableVertexAttribArray(_colorAttribLocation)); if (g_context.multitextureSupported) { GL_CALL(glActiveTexture(GL_TEXTURE0)); @@ -48,12 +61,21 @@ void ShaderPipeline::activateInternal() { void ShaderPipeline::deactivateInternal() { GL_CALL(glDisableVertexAttribArray(_vertexAttribLocation)); GL_CALL(glDisableVertexAttribArray(_texCoordAttribLocation)); + GL_CALL(glDisableVertexAttribArray(_colorAttribLocation)); _activeShader->deactivate(); } void ShaderPipeline::setColor(GLfloat r, GLfloat g, GLfloat b, GLfloat a) { - GL_CALL(glVertexAttrib4f(_colorAttribLocation, r, g, b, a)); + GLfloat *dst = _colorAttributes; + for (uint i = 0; i < 4; ++i) { + *dst++ = r; + *dst++ = g; + *dst++ = b; + *dst++ = a; + } + + GL_CALL(glVertexAttribPointer(_colorAttribLocation, 4, GL_FLOAT, GL_FALSE, 0, _colorAttributes)); } void ShaderPipeline::drawTexture(const GLTexture &texture, const GLfloat *coordinates) { |