void Device::draw_pixels(device_memory& rgba, int y, int w, int h, int dx, int dy, int width, int height, bool transparent,
const DeviceDrawParams &draw_params)
{
pixels_copy_from(rgba, y, w, h);
if(transparent) {
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
glColor3f(1.0f, 1.0f, 1.0f);
if(rgba.data_type == TYPE_HALF) {
/* for multi devices, this assumes the inefficient method that we allocate
* all pixels on the device even though we only render to a subset */
GLhalf *data_pointer = (GLhalf*)rgba.data_pointer;
float vbuffer[16], *basep;
float *vp = NULL;
data_pointer += 4*y*w;
/* draw half float texture, GLSL shader for display transform assumed to be bound */
GLuint texid;
glGenTextures(1, &texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGBA, GL_HALF_FLOAT, data_pointer);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable(GL_TEXTURE_2D);
if(draw_params.bind_display_space_shader_cb) {
draw_params.bind_display_space_shader_cb();
}
if(GLEW_VERSION_1_5) {
if(!vertex_buffer)
glGenBuffers(1, &vertex_buffer);
glBindBuffer(GL_ARRAY_BUFFER, vertex_buffer);
/* invalidate old contents - avoids stalling if buffer is still waiting in queue to be rendered */
glBufferData(GL_ARRAY_BUFFER, 16 * sizeof(float), NULL, GL_STREAM_DRAW);
vp = (float *)glMapBuffer(GL_ARRAY_BUFFER, GL_WRITE_ONLY);
basep = NULL;
}
else {
basep = vbuffer;
vp = vbuffer;
}
if(vp) {
/* texture coordinate - vertex pair */
vp[0] = 0.0f;
vp[1] = 0.0f;
vp[2] = dx;
vp[3] = dy;
vp[4] = 1.0f;
vp[5] = 0.0f;
vp[6] = (float)width + dx;
vp[7] = dy;
vp[8] = 1.0f;
vp[9] = 1.0f;
vp[10] = (float)width + dx;
vp[11] = (float)height + dy;
vp[12] = 0.0f;
vp[13] = 1.0f;
vp[14] = dx;
vp[15] = (float)height + dy;
if(vertex_buffer)
glUnmapBuffer(GL_ARRAY_BUFFER);
}
glTexCoordPointer(2, GL_FLOAT, 4 * sizeof(float), basep);
glVertexPointer(2, GL_FLOAT, 4 * sizeof(float), ((char *)basep) + 2 * sizeof(float));
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_VERTEX_ARRAY);
if(vertex_buffer) {
glBindBuffer(GL_ARRAY_BUFFER, 0);
}
if(draw_params.unbind_display_space_shader_cb) {
draw_params.unbind_display_space_shader_cb();
}
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
glDeleteTextures(1, &texid);
}
else {
/* fallback for old graphics cards that don't support GLSL, half float,
* and non-power-of-two textures */
glPixelZoom((float)width/(float)w, (float)height/(float)h);
glRasterPos2f(dx, dy);
uint8_t *pixels = (uint8_t*)rgba.data_pointer;
pixels += 4*y*w;
glDrawPixels(w, h, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
glRasterPos2f(0.0f, 0.0f);
glPixelZoom(1.0f, 1.0f);
}
if(transparent)
glDisable(GL_BLEND);
}
void Device::draw_pixels(device_memory& rgba, int y, int w, int h, int dy, int width, int height, bool transparent,
const DeviceDrawParams &draw_params)
{
pixels_copy_from(rgba, y, w, h);
if(transparent) {
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
}
glColor3f(1.0f, 1.0f, 1.0f);
if(rgba.data_type == TYPE_HALF) {
/* for multi devices, this assumes the inefficient method that we allocate
* all pixels on the device even though we only render to a subset */
GLhalf *data_pointer = (GLhalf*)rgba.data_pointer;
data_pointer += 4*y*w;
/* draw half float texture, GLSL shader for display transform assumed to be bound */
GLuint texid;
glGenTextures(1, &texid);
glBindTexture(GL_TEXTURE_2D, texid);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, w, h, 0, GL_RGBA, GL_HALF_FLOAT, data_pointer);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable(GL_TEXTURE_2D);
if(draw_params.bind_display_space_shader_cb) {
draw_params.bind_display_space_shader_cb();
}
glPushMatrix();
glTranslatef(0.0f, (float)dy, 0.0f);
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f);
glVertex2f(0.0f, 0.0f);
glTexCoord2f(1.0f, 0.0f);
glVertex2f((float)width, 0.0f);
glTexCoord2f(1.0f, 1.0f);
glVertex2f((float)width, (float)height);
glTexCoord2f(0.0f, 1.0f);
glVertex2f(0.0f, (float)height);
glEnd();
glPopMatrix();
if(draw_params.unbind_display_space_shader_cb) {
draw_params.unbind_display_space_shader_cb();
}
glBindTexture(GL_TEXTURE_2D, 0);
glDisable(GL_TEXTURE_2D);
glDeleteTextures(1, &texid);
}
else {
/* fallback for old graphics cards that don't support GLSL, half float,
* and non-power-of-two textures */
glPixelZoom((float)width/(float)w, (float)height/(float)h);
glRasterPos2f(0, dy);
uint8_t *pixels = (uint8_t*)rgba.data_pointer;
pixels += 4*y*w;
glDrawPixels(w, h, GL_RGBA, GL_UNSIGNED_BYTE, pixels);
glRasterPos2f(0.0f, 0.0f);
glPixelZoom(1.0f, 1.0f);
}
if(transparent)
glDisable(GL_BLEND);
}