thirdparty/scummvm
2
0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

GRIM: Implement GfxOpenGLS::dimRegion

Browse source
This commit is contained in:
Joel Teichroeb 2014-07-07 13:50:38 -07:00
parent 1688a74cf8
commit f02aad6290
2 changed files with 58 additions and 1 deletions
Download patch file Download diff file Expand all files Collapse all files

57
engines/grim/gfx_opengl_shaders.cpp
View file

@ -302,6 +302,14 @@ void GfxOpenGLS::setupPrimitives() {
_dimProgram->enableVertexAttribute("position", _dimVBO, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), 0);
_dimProgram->enableVertexAttribute("texcoord", _dimVBO, 2, GL_FLOAT, GL_FALSE, 2 * sizeof(float), 0);
glGenBuffers(1, &_dimRegionVBO);
glBindBuffer(GL_ARRAY_BUFFER, _dimRegionVBO);
glBufferData(GL_ARRAY_BUFFER, 24 * sizeof(float), nullptr, GL_DYNAMIC_DRAW);
_dimRegionProgram->enableVertexAttribute("position", _dimRegionVBO, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), 0);
_dimRegionProgram->enableVertexAttribute("texcoord", _dimRegionVBO, 2, GL_FLOAT, GL_FALSE, 4 * sizeof(float), 2 * sizeof(float));
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
@ -332,6 +340,7 @@ void GfxOpenGLS::setupShaders() {
_shadowPlaneProgram = Graphics::Shader::fromFiles("grim_shadowplane", primAttributes);
_dimProgram = Graphics::Shader::fromFiles("dim", commonAttributes);
_dimRegionProgram = _dimProgram->clone();
}
setupQuadEBO();
@ -1529,8 +1538,54 @@ void GfxOpenGLS::dimScreen() {
}
void GfxOpenGLS::dimRegion(int x, int y, int w, int h, float level) {
void GfxOpenGLS::dimRegion(int xin, int yReal, int w, int h, float level) {
xin = (int)(xin * _scaleW);
yReal = (int)(yReal * _scaleH);
w = (int)(w * _scaleW);
h = (int)(h * _scaleH);
int yin = _screenHeight - yReal - h;
GLuint texture;
glGenTextures(1, &texture);
glBindTexture(GL_TEXTURE_2D, texture);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, w, h, 0, GL_RGBA, GL_UNSIGNED_BYTE, nullptr);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glCopyTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, xin, yin, w, h, 0);
glBindBuffer(GL_ARRAY_BUFFER, _dimRegionVBO);
float width = w;
float height = h;
float x = xin;
float y = yin;
float points[24] = {
x, y, 0.0f, 0.0f,
x + width, y, 1.0f, 0.0f,
x + width, y + height, 1.0f, 1.0f,
x + width, y + height, 1.0f, 1.0f,
x, y + height, 0.0f, 1.0f,
x, y, 0.0f, 0.0f,
};
glBufferSubData(GL_ARRAY_BUFFER, 0, 24 * sizeof(float), points);
_dimRegionProgram->use();
_dimRegionProgram->setUniform("scaleWH", Math::Vector2d(1.f / _screenWidth, 1.f / _screenHeight));
_dimRegionProgram->setUniform("tex", 0);
glDisable(GL_DEPTH_TEST);
glDepthMask(GL_FALSE);
glDrawArrays(GL_TRIANGLES, 0, 6);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glDeleteTextures(1, &texture);
}